Question

Suppose a researcher is studying a population in which 57% of the population has a certain trait. Round your answer to the nearest tenth of a percent if needed.

The researcher studies a simple random sample of size n = 30. What is the approximate standard deviation of a sampling distribution of the proportion for samples this size?
(Points : 1)
1.4%

1.9%

8.2%

9.0%

Answer 1

3. Suppose a researcher is studying a population in which 57% of the population has a certain trait. Round your answers to the nearest tenth of a percent if needed.

The researcher wants a sampling distribution with a standard deviation that is less than 6%. Would a sample size of 50 give a standard deviation that is less than 6%? How about a sample size of 100?
(Points : 1)
Yes for n = 50;Yes for n = 100

Yes for n = 50; No for n = 100

No for n = 50; Yes for n = 100

No for n = 50; No for n = 100



Question 4.4. Parma wallabies have a mean tail length of 18.5 inches and a standard deviation of 1.25 inches. Round your answer to the nearest thousandth if needed.

Suppose a research team takes a random sample of 150 Parma wallabies. What is the approximate standard deviation of the sampling distribution of mean tail lengths?
(Points : 1)
0.008

0.102

0.123

0.158