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goblinko [34]
3 years ago
7

What does it mean when sampling is done without​ replacement? Choose the correct answer below. A. Once an individual is​ selecte

d, the individual cannot be selected again. B. Once an individual is​ selected, the individual can be selected again. C. Once a sample is​ taken, those individuals are no longer considered part of the population. D. Once a sample is​ taken, those individuals cannot be selected for any other samples.
Mathematics
1 answer:
solmaris [256]3 years ago
8 0

Answer:

The correct option is A) Once an individual is​ selected, the individual cannot be selected again.

Step-by-step explanation:

Consider the provided statement.

Without​ replacement mean each population sample unit has only one opportunity in the sample to be chosen.

For example:

If a bag contains 5 red and 3 white ball and you randomly select a white ball, the probability of selecting the white ball is 3/8.

Now if the experiment is done by without replacement that means the white ball (which you have selected) is no longer the part of the sample space.

Hence, we can say that once an individual is​ selected, the individual cannot be selected again.

Thus, the correct option is A) Once an individual is​ selected, the individual cannot be selected again.

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Sixty seven percent of the employees in a company have managerial positions, and 58 percent of the employees in the company have
Kazeer [188]

Answer: The proportion of employees who either have MBAs or are managers are 0.58.

Step-by-step explanation:

Since we have given that

Probability of employees having managerial positions = 67%

Probability of employees having MBA degrees = 58%

Probability of managers having MBA degrees = 67%

So, using probability formulas, we get that

P(A\cup B)=P(A)+P(B)-P(A\cap B)\\\\P(A\cup B)=0.67+0.58-0.67\\\\P(A\cup B)=0.58

Hence, the proportion of employees who either have MBAs or are managers are 0.58.

7 0
4 years ago
Sydney asked her friends to write down the number of hours they practice their instruments each week. The data is shown.
AnnyKZ [126]
The median in this data set is C. 5
8 0
3 years ago
Check whether the given number is a solution of the equation<br> 6x+1-5x=7;2
slava [35]
6x + 1 - 5x = 7 when x = 2

To check this answer, you simply need to plug in 2 for x in the original equation.

6x + 1 - 5x = 7

6(2) + 1 - 5(2) = 7

Simplify.

12 + 1 - 10 = 7

Simplify.

13 - 10 = 7

Simplify.

3 = 7

3 ≠ 7 Therefore x does NOT equal 2.

~Hope I helped!~
8 0
4 years ago
Each of 8 students reported the number of movies they saw in the past year. This is what they reported: 5, 4, 18, 19, 12, 20, 12
djyliett [7]
Mean is just the average of all of them
So... 5 + 4 + 18 + 19 + 12 + 20 + 12 + 12 = 102
Then you divide that number by the amount of numbers you have so 102 / 8 = 12.75 or rounding it up to 13

For median you have to first put them in order from smallest to largest.
So 4 5 12 12 12 18 19 20
Then you have to find the middle number between them but in this case we have two... 12 and 12. Since they're the same number, the median is 12.
5 0
3 years ago
<img src="https://tex.z-dn.net/?f=4%20%5Cdiv%20%20%5Cfrac%7B1%7D%7B2%7D%20" id="TexFormula1" title="4 \div \frac{1}{2} " alt="4
IRINA_888 [86]

Answer:

8

Step-by-step explanation:

4 ÷ 1/2

~Turn the 4 into a fraction

4/1 ÷ 1/2

~Copy Dopt Flip

4/1 * 2/1

~Multiply

8/1

~Simplify

8

Best of Luck!

8 0
3 years ago
Read 2 more answers
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