PSTAT 5LS MIDTERM 2 TEST QUESTIONS AND ANSWERS

PSTAT 5LS MIDTERM 2 TEST QUESTIONS
AND ANSWERS




Central Limit theory (case 1) - ANSWER Large sample, is taken from a
population with any type of distribution that has a mean mew and std dev sigma
-sample means will have a normal distribution

Central limit theory (second case) - ANSWER If a sample of any size is taken
from a population with a normal distribution with mean mew and std dev sigma
-the dist of means of sample size n will be normal

Population mean - ANSWER

Sample mean - ANSWER

Mean of sample means - ANSWER

Standard deviation of sample means - ANSWER

Sampling distributions - ANSWER the probability distribution of a statistic

Rules for sampling distribution - ANSWER -for samples size n=30+ the
distribution of the sample means can be approximated by a normal distribution
-check binomial criteria

sample proportion - ANSWER

Sampling distribution of p hat - ANSWER as the sample size increases, the
sampling distribution becomes normal

mean of a sampling distribution of p hat - ANSWER