Test 2

Question 1

The mean of sample means will be close to what?

Answer 1

The population mean

Question 2

Is the spread of a sampling distribution smaller or larger than the spread of the population distribution?

Answer 2

smaller

Question 3

For a sample distribution, what causes the spread to get smaller?

Answer 3

larger sample size

Question 4

What is statistical inference?

Answer 4

drawing conclusions about a population from sample data

Question 5

What is point estimation?

Answer 5

using a sample statistic to estimate a parameter

Question 6

What is a confidence interval?

Answer 6

supplements an estimate of a parameter with an indication of it variability

Question 7

What is a hypothesis test?

Answer 7

assesses evidence for a claim about a parameter by comparing it with observed data

Question 8

an accurate and precise estimate is called what?

Answer 8

unbiased

Question 9

How can you decrease the probability of a type 1 and type 2 error?

Answer 9

increase sample size

Question 10

What is the term used when a null hypothesis is rejected?

Answer 10

statistically significant