Module 4: Confidence Intervals and Hypothesis Testing

Question 1

Standard Error

Answer 1

• Measures how accurately a sample distribution represents the population
• Ex: Sample mean deviates from the actual mean, the difference is the standard error

Question 2

Confidence Interval

Answer 2

• The probability that a population parameter will fall between a set of values
• Ex: Data from 100 schools, CI of 90% of the means from those school will fall between the CI values

Question 3

Null Hypothesis

Answer 3

-Tests that nothing happens

H sub 0

Question 4

Alternate Hypothesis

Answer 4

• Test that something happens

- H sub a

Question 5

P-value

Answer 5

• The probability of obtaining results at least as extreme as the observed results of a statistical hypothesis test
• If it’s less than 5% null hypothesis is rejected