Unit 5: Sampling Distributions

Question 1

z-score formula

Answer 1

Question 2

Mean of sampling distribution for proportions

Answer 2

p is coming from the claim

Question 3

standard devation of sampling distribution for proportions

Answer 3

Question 4

What conditions do you check to see if you can use a normal distribution for a sampling distribution for proportions?

Answer 4

1. Is each event independent of each other?
2. Is the sample size less than 10% of the population size?
3. Is the sample size large enough where np>=10 and n(1-p)>=10?

Question 5

Mean for differences in sampling distributions for proportions

Answer 5

Question 6

standard deviation in differences of sampling distributions for proportions

Answer 6

Question 7

Mean of sampling distribution for means

Answer 7

Question 8

standard deviation of sampling distribution for means

Answer 8

Question 9

What conditions do you check to see if you can use a normal distribution for a sampling distribution for means?

Answer 9

1. Tells you that data is approximately normally distributed or graph the data to see if it’s approximately normal (symmetric and unimodal)
2. n>=30

Question 10

Central Limit Theorem

Answer 10

when a sample size is sufficiently large, a sampling distribution of the mean of a random variable will be approximately normal.

Question 11

Mean for differences in sampling distributions for means

Answer 11

Question 12

Standard deviation for differences in sampling distributions for means

Answer 12

Question 13

Finding the critical z value for each confidence level

Answer 13