Question

Suppose you take a sample of size 4 from a population that is normally distributed with a mean of 70 and a standard deviation of 10. Based on such a sample, what is the (approximate) probability of getting a sample mean between 60 and 80?

Question 3 options:

	0.025
	0.05
	0.5
	0.95
	0.975

Question 4 (1 point)

Suppose you take a sample of size 4 from a population that is normally distributed with a known standard deviation of 10. You get a sample mean of 20. What is the probability the population mean is 30 or more?

Question 4 options:

	0.025
	0.05
	0.5
	0.95
	Either 0 or 1, but we don't know which.

Question 5 (1 point)

You want to estimate the proportion of Canadians who have read fewer than 2 books in the past year. You think the population proportion is about 0.65. What is the minimum sample size you need to be able to use a normal approximation in your statistical analysis?

Question 5 options:

	29
	28
	15
	16

Answer 1

according to HOMEWORKLIB RULES I have solved one question