Answer: D. Simple Random Sampling
Step-by-step explanation: When selection is made or based on chance which is equal or the same for all members within a population. In the scenario described above, there is no prior shuffling, arrangement or segregation of members within the population into groups or subgroups, rather the interviewed voters were chosen at random directly from within the larger population based on equal chance. Therefore voters already have their numbers, then using a random number generator, voters whose number corresponds were interviewed is a clear scenario of simple Random Sampling.
Using sampling concepts, it is found that the correct option is:
d. simple random sampling
Samples are classified as:
Convenient: Drawn from a conveniently available pool. Random: All the options into a hat and drawn some of them. Systematic: Every kth element is taken. Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed. Stratified: Also divides the population into groups. However, only some elements of each group are surveyed.In this problem, a random number is generated to select each voter, hence it is a simple random sampling, and option d is correct.
To learn more about sampling concepts, you can take a look at https://brainly.com/question/25122507
Solve for the value of X. 62 = 12 - 5x
Answer:
x = -10
Step-by-step explanation:
62 = 12 - 5x
-12 . -12
62 - 12 = -5x
50 = -5x
__ . __
-5 . -5
-10 = x
is 2 square root of 5 plus three rational or irrational
Answer:
It is irrational
Step-by-step explanation:
It is irrational.
PLEASE HELP ASSAAPPP!!!!!!!!A river discharges 4 × 106 cubic feet of water into the Pacific Ocean each second. There are 86,400 seconds in one day. To find the amount of water discharged each day, a scientist multiplied 4 × 106 by 86,400 on his calculator. The display showed: Explain what 3.456E + 14 means. A. 3.456^14 B. 3.456 × 10^6 C. 3.456 × 10^14 D. 3.456 × 10^ -14
Answer:
C
Step-by-step explanation:
The river discharges 4 x 10^6 cubic feet of water into the Pacific Ocean each second.
There are 86,400 seconds in one day.
Amount of water discharges each day-
=4x10^6x86400
=345600000000
=3.456 x 10 ^11
Answer: C
Step-by-step explanation:
1) First multiply 4 * 10^6 = 4,000,000
Then multiply 4,000,000 by 86,400 = 3.456 * 10^11
Select the statements that are true based on the following given information. D = {x | x is a whole number} E = {x | x is a perfect square < 36} F = {x | x is an even number between 20 and 30} a) The expression D ∩ E is {1, 4, 9, 16}. b) The expression D ∩ F is {12, 14, 16, 18}. c) D ∪ (E ∩ F) is {all whole numbers}. d) (E ∩ F) is the empty set. e) The expression D ∩ (E U F) is 25
==========================================================
Explanation:
Let's write the roster notation of each set
D = {0, 1, 2, 3, ...} the dots indicate the pattern goes on forever
E = {0, 1, 4, 9, 16, 25} = list of perfect squares smaller than 36
F = {20, 22, 24, 26, 28, 30} = even numbers between 20 and 30
----------------
If we intersect sets D and E, we're looking for what numbers are in both sets at the same time. Therefore, D ∩ E = {0, 1, 4, 9, 16, 25} which is the exact same as set E. This is because all of set E is inside of set D. We say that set E is a subset of set D. So, D ∩ E = E.
Choice A is very close to being true. The problem is that 25 is missing from the set {1,4,9,16}. So this is why choice A is false.
----------------
Now let's intersect sets D and F. The numbers they have in common are {20, 22, 24, 26, 28, 30} which is exactly what set F is. So set F is a subset of set D. We can write D ∩ F = F in much the same way we can say D ∩ E = E.
D ∩ F = {12,14,16,18} is not true. A number like 12 is not between 20 and 30, so it cannot be in set F.
Choice B is false so we cross it off the list.
----------------
Choice C is true and here's why
D ∪ (E ∩ F) is the same as saying D ∪ G where G is the set of intersecting E and F together. In other words, G = E ∩ F
We don't really need to even worry about sets E, F or G. All that matters here is set D.
When we write D ∪ (E ∩ F) or D ∪ G, we're saying "a number is in set D, or it is in set G". If it is in D, then it's a whole number. Otherwise, it's in a subset of whole numbers.
Overall, D ∪ G and D ∪ (E ∩ F) form the entire set of whole numbers.
------------------
Choice D is true.
E and F have nothing in common
E = {0, 1, 4, 9, 16, 25}
F = {20, 22, 24, 26, 28, 30}
So intersecting them leads to the empty set. This is the set with nothing inside it, not even 0.
------------------
Choice F is false
These two sets below
E = {0, 1, 4, 9, 16, 25}
F = {20, 22, 24, 26, 28, 30}
union together to get
H = {0,1,4,9,16,20,22,24,25,26,28,30}
just toss all of the numbers together into one big set
Notice how each of these numbers are whole numbers, so they are part of set D. This means set H is also a subset of set D.
When we intersect sets D and H, we end up with set H. We do not simply end up with the set with 25 only inside it.
Write the opposite of the number. -4/5 (The four is not negative, the whole fraction is)
Answer:
4/5.
Step-by-step explanation:
The opposite of -4/5 is 4/5.
Answer:
4/5
Step-by-step explanation:
The opposite of a number is that number with the opposite sign.
The opposite of a positive number is a negative number. The opposite of a negative number is a positive number. The opposite of zero is zero since -0 means 0.
Examples:
opposite of -5 is 5
opposite of 1/2 is -1/2
opposite of 28 is -28
opposite of -sqrt(5) is sqrt(5)
Your problem:
opposite of -4/5 is 4/5
Solve the equation
36 +x=20
Answer:
-16 is the answer because u cant add to have a number lower than the one in equation
30 POINTS! ASAP PLEASE ∠1 is a supplement of ∠2, and m∠1=123∘. ∠2 is a complement of ∠3. Find m∠3. m∠3=
Answer:
angle 3 is 33 degrees.
Step-by-step explanation:
complementary angle-adds up to 90 degrees
supplementary angle- adds up to 180 degrees.
if angle 1 is 123, then angle two is 180-123 degrees(57)
if angle two is 57 degrees, angle 3 is 90-57 degrees (33)
Answer:
m∠3 = 33°Step-by-step explanation:
Since ∠1 and ∠2 are supplementary the sum of their angles is 180°
So to find ∠2 add ∠1 and ∠2 and equate them to 180° to solve for ∠2
So we have
∠1 + ∠2 = 180
∠2 = 180 - ∠1
From the question
m∠1 = 123°
So we have
∠2 = 180 - 123
∠2 = 57°
From the question , ∠2 is a complement of ∠3 the sum of their angles is 90°
That's
∠2 + ∠3 = 90
∠3 = 90 - ∠2
∠3 = 90 - 57
We have the final answer as
m∠3 = 33°Hope this helps you
Which statement accurately describes lines of laditude also called parallels on a map? A. They measure distance east and west of the equator B. They measure the distance east and west of the prime meridian C. They measure distance north and south of the prime meridian D. They measure distance north and south of the equator
Answer:
A
Step-by-step explanation:
they measure the distance east to west of the equator
Luther drives 17 miles to work each day . After work he takes a short cut home which is 14 miles . How many miles does he drive to and from work each week (5 days)
Step-by-step explanation:
17 miles = 1 day to work
14 miles =1 day to home
Therefore total miles driven in 5 days =
( 17×5) +(14×5) = 105+60
ANSWER =165 miles per week
Answer:
155 miles each week
Step-by-step explanation:
One day is 17 miles to and 14 miles home = 17+14 = 31
He does this 5 days a week
5 * 31 = 155 miles
Is it possible for one ray to be shorter in distance than another ray
Answer:
please mark my answer brainliest
Step-by-step explanation:
no...because it extends to infinity from one side
(5a^3-2a^2)+(6a^3+9a^2+8a)
Answer:
11a^3 + 7a^2 + 8a
Step-by-step explanation:
( 5a^3 - 2a^2 ) + ( 6a^3 + 9a^2 + 8a )
= 5a^3 + 6a^3 + -2a^2 + 9a^2 + 8a
= 11a^3 + 7a^2 + 8a
How do you interpret expressions that represent a quantity in terms of its context?
Footwear manufacturing is projected to decrease output by 5% from 2009 to 2019. If footwear manufacturing had 1.5 million dollars of output in 2009, approximately how much output is expected in 2019?
Answer:
$1,425,000
Step-by-step explanation:
1 (original output) - .05 (decrease in output) = .95 (2019 output compared to 2009)
1,500,000 X .95 = 1,425,000
I hope this helps!
-TheBusinessMan
Why Is 3 times 1/10 less than 3 times 10?k
3 times 1/10 is equal to 3/10, whereas 3 times 10 is equal to 30.
3/ 10 is less than 30.
We can write this as 3 * 1/10 compared to 3 * 10
If we divide both sides by 3, we then compare 1/10 and 10.
1/10 is less than 10, so 3 times 1/10 is less than 3 times 10.
We can rewrite 1/10 = 0.1, so 3 * 0.1 is 0.3 whereas 3 * 10 = 30.
Answer:
See Explanation
Step-by-step explanation:
When you multiply 3 * 1/10, 3 goes in the numerator so you get 3/10 which is 0.3
On the other hand 3*10 is 30.
0.3 is less than 30 that's why.
Here's the thing you had one pizza slice (equal to 1/10), and your parents gave you three times more the pizza slice. You will have three slices of pizza (each slice being 1/10) not 30 pizzas.
Hope that makes sense. I can explain again if you need me to!
Rename 2/5 and 1/2 using the least common denominator
the common denominator is 10 (between 5 and 2)
for each numerator:
we divide the common denominator with the denominator of each fraction and then multiply with the numerator of the fraction
first fraction's numerator:
10 (c.d.) : 5 (denominator) = 2
2 * 2 (numerator) = 4
second one:
10 (c.d.) : 2 (denominator) = 5
5 * 1 (numerator) = 5
The fractions are 4/10 and 5/10
30 points! need asap The endpoints of CD¯¯¯¯¯¯¯¯ are C(5, 3) and D(−3,−6). Find the coordinates of the midpoint M. Coordinates of midpoint M:
Answer:
The midpoint is ( 1, -1.5)
Step-by-step explanation:
To find the midpoint
Add the x coordinates of the endpoints and divide by 2 to get the x coordinate of the midpoint
(5+-3)/2 = 2/2 = 1
Add the y coordinates of the endpoints and divide by 2 to get the y coordinate of the midpoint
(3+-6)/2 = -3/2 = -1.5
The midpoint is ( 1, -1.5)
Answer:
mid point = 1, -1.5
Step-by-step explanation:
mid point between two points C(5, 3) and D(-3, -6)
M = (x1 + x2)/2 , (y1 + y2)/2
mid point = (5 + (-3)) / 2 , (3 + -6)/2
mid point = 2/2 , -3/2
mid point = 1, -1.5
is 0.7 divided by 10 equivalent to 0.07
Answer:
yes
Step-by-step explanation:
yes because if you do the math you and you use your brain it's obvious
Step-by-step explanation:
cause I know it
An air conditioning system can circulate 320 cubic feet of air per minute. How many cubic yards of air can it circulate per minute?
Step-by-step explanation:
It is given that, an air conditioning system can circulate 320 cubic feet of air per minute. We need to find how many cubic yards of air can it circulate per minute?
1 yard = 3 foot
1 feet = (1/3) yard
320 feet = 106.66 yard
[tex]320\ \text{feet}^3=320\times( \dfrac{1}{3})^3\ \text{yard}^3\\\\=11.85\ \text{yard}^3[/tex]
So, it will circulate 11.85 cubic yard of air per minute.
Consider the following Excel regression of perceived sound quality as a function of price for 27 stereo speakers. Regression Statistics R Square 0.01104 Standard Error 4.02545 Observations 27 Statistic Coefficients Std Error t Stat P-value Lower 95% Upper 95% Intercept 88.4902 1.67814 52.731 0.0000 85.0340 91.9464 Price –0.00239 0.00453 –0.528 0.6019 –0.01172 0.00693 Picture Click here for the Excel Data File(a) Is the coefficient of Price significantly different from zero at α = .05?YesNo(b) Calculate the correlation coefficient. At α = .05, does the correlation differ from zero? (Negative values should be indicated by a minus sign. Round your answers to 3 decimal places.) r tcalc t.025 ± Since tcalc (Click to select)>< t.025, we (Click to select)rejectfail to reject the hypothesis of no correlation.(c) Given these results, is the difference in quality associated with a higher price likely to be apparent to an average listener?YesNo
Answer:
Kindly check explanation
Step-by-step explanation:
Given the following :
Regression
Statistics
R Square 0.01104
Standard Error 4.02545
Observations 27
Stat - - - - Coef - - Std Error - - t-Stat - - P-value
Int. - - 88.4902 - 1.67814 - - 52.731 - - 0.0000
Price (–0.00239) - 0.00453 (–0.528) - - 0.6019
Stat - - - - lower 95% - - - upper 95%
Int. - - - - - 85.0340 - - - - - - 91.9464
Price - - (–0.01172) - - - - - - 0.00693
(A) No, At α = .05, the Coefficient of price is not significantly different from zero, because :
The p-value (0.6019) obtained is greater than 0.05, Hence we fail to reject the null hypothesis.
B) the correlation Coefficient (r) :
Since ; r^2 = 0.01104
r = √0.01104
r = 0.1050714
The p-value obtained at α = .05 for r value of 0.1051 using the online p-value calculator is .602, this shows that correlation does not differ from 0.
Using :
r(√n-2) / √1 - r^2
0.1051(√27-2) / √1 - 0.01104
0.5255 / 0.9944646
= 0.5284250
For a 2 tailed test: α = .025
t0. 025 = 2.060 and - 2.060
Obtained t value is less than the critical, hence the null hypothesis stands
Evaluate the expression when a = 9 and b = 7.
b+5a
Help
Needed
A rectangular box with no top is to be built from 1728 square meters of material. Find the dimensions of such a box that will enclose the maximum volume.
Answer:
given surface area with no top as 1728
We say
V= X x Y x Z
So
yz = a(y+2z)
xz = a(x+2z)
Then using partial derivatives
xy = a(2x+2y)
xy+2xz+2yz = 1728
So
xy+2yz = xy+2xz
x=y
So
4xz = x²+ 2xz
x = 2z
4z²+4z²+4z²= 1728
z² = 432
z = 20.8m
x = y = 41.6m
-3p+6=-12
How to solve
Answer:
p = 6
Step-by-step explanation:
-3p+6=-12
Subtract 6 from each side
-3p+6-6=-12-6
-3p = -18
Divide each side by -3
-3p/-3 = -18/-3
p = 6
find the quotient. (-2) divided by 9
Answer:
-0.22222222222222222222222
Step-by-step explanation:
The function ƒ (x) = 12x gives the number of inches in x feet, and g(x) = 3.28x gives the approximate number of feet in x meters. Write a composite function that could be used to convert meters to inches.
Answer:
39.36xStep-by-step explanation:
Given the f(x) = 12x as the number of inches in x feet and g(x) = 3.28x gives the approximate number of feet in x meters, to find the composite function that can be used to convert metres to inches will give;
f[g(x)] (This means we are substituting the function that is measured in metres into the functions measured in inches).
Given g(x) = 3.28x,
f[g(x)] = f(3.28x)
f(3.28x) means that we are to replace the variable of x in f(x) with 3.28x as shown;
f(3.28x) = 12(3.28x)
f(3.28x) = 39.36x
f[g(x)] = 39.36x
Hence the composite function that could be used to convert meters to inches is expressed as 39.36x.
In a parallelogram ABCD, AB is parallel to CD. Which two sides are opposite sides ? sides AB and CD sides BC and CD sides AB and AD sides AB and BC
Answer:
AB and CD
Step-by-step explanation:
Given
Shape: Parallelogram
Parallel Side: AB and CD
Required
Determine the opposite sides
From the given parameters, we understand that:
AB is parallel to CD
Since they are parallel, then AB is opposite to CD
Hence, the opposite sides are AB and CD
¿Para qué sirve saber estimar la capacidad de un recipiente utilizando el litro y el mililitro como unidades de medida?
Answer:
Estas unidades de capacidad son de uso frecuente en la manipulación de líquidos, así como en la estimación de la masa contenida del líquido dentro del recipiente si se conoce su densidad.
Además, permite clasificar hasta cuanto volumen y cuanta masa de un líquido determinado puede portar ese recipiente.
Step-by-step explanation:
Sirve la estimación de la capacidad de un recipiente dado en función de otros recipientes con capacidades de referencia, en cuyos casos corresponden al litro y el mililitro, respectivamente. Entonces, la capacidad total es aproximadamente la suma de las cantidades de adiciones de cada recipiente de referencia. La fórmula de estimación de capacidad del recipiente es:
[tex]V_{tot} \approx n_{l}\cdot (1000\,mL)+n_{L}\cdot (1\,mL)[/tex]
Donde:
[tex]V_{tot}[/tex] - Volumen total del recipiente, medido en mililitros.
[tex]n_{l}[/tex] - Cantidad de adiciones del recipiente con capacidad de un mililitro, adimensional.
[tex]n_{L}[/tex] - Cantidad de adiciones del recipiente con capacidad de un mililitro, adimensional.
Estas unidades de capacidad son de uso frecuente en la manipulación de líquidos, así como en la estimación de la masa contenida del líquido dentro del recipiente si se conoce su densidad.
Además, permite clasificar hasta cuanto volumen y cuanta masa de un líquido determinado puede portar ese recipiente.
Expresa el siguiente número 14322000000000000 en notación científica *
Answer:
14322 * 10¹²
1.4322 * 10¹⁶
Step-by-step explanation:
14322000000000000
14322 * 10¹²
1.4322 * 10¹⁶
A school district's superintendent wants to administer a test of life skills to a sample of students. The superintendent has ample time and resources to conduct the study, as well as access to detailed information about all students' addresses, courses, grades, and attendance. Which of the following would be the worst sampling method for the superintendent to use?
-Cluster Sampling
-Convenience Sampling
-Stratified Sampling
-Systematic Sampling
Answer:
-Convenience Sampling
Step-by-step explanation:
Convenience Sampling is a sampling method that is employed simply because the samples are easy to reach or access. It is a non-probability system of sampling and not a very strong method of sampling. For a serious research such as the one being conducted by the Superintendent, who has ample time to perform the research, this is not a very good sampling method. A Convenience style of research would mean that he can just walk into a cafeteria with students and administer the test to them.
Since he has detailed information of the students, he should choose any of the other mentioned sampling techniques in the options provided to randomly select the subjects. This would help to prevent bias, and enable him to make generalizations with the result of the research.
In a survey of 1250 shopper at a local mall, 1000 of them had a smart phone. What percent of the shopper at the mall had a smart phone?
Answer:
80 percent
Step-by-step explanation:
(1000/1250)*100 = 80
8x - 3 = 5 (2x + 1) solve for x
Answer:
x=−4
Step-by-step explanation:
Answer:
-4
Step-by-step explanation:
Given:
8x - 3 = 5 (2x + 1)Solving for x:
8x - 3 = 10x + 510x - 8x = -3 - 52x = - 8x = -8/2x = -4