Test 3

Question 1

Properties of t-distribution

Answer 1

• Ticker tails and lower peak than a normal curve

- As df gets bigger, becomes more like a normal distribution

Question 2

Plus Four Confidence Interval

Answer 2

• Gives a more accurate confidence interval in problematic scenarios (not enough successes/failures–>p close to 0 or 1)
• Use when C at least 90%, n at least 10

Question 3

Big x2 value

Answer 3

-Stronger evidence of association (against null)

Question 4

Chi square reject/accept statement

Answer 4

-There is/is not a statistically significant association between variables at the a% level