STAT 302 Midterm: STAT302 Midterm 1 Practice Version B Solution

• School: Simon Fraser University
• Department: Statistics
• Course: STAT 302
• Professor: All

Document Summary

Statistics 302 practice midterm exam 1b solutions: (1 mark) true or false: statistical signi cance is the same as practical signi - cance. Solution: something like: the chance of seeing a statistic as or more extreme than the observed value if the null hypothesis was true: (1 mark) in one sentence, describe what is wrong with the following statement: We tested the null hypothesis h0 : x = 0 against a two-sided alternative at the 5% level. Solution: the model can either be in terms of variables y and x if de ned, or in terms of variable names. Let y be expense and x be los, then the model is y |x = 0 + 1x. Solution: the estimated slope is 191. 56 (1 mark) and the estimated intercept is 1281. 96 (1 mark). (c) (1 mark) write a short sentence to interpret the e ect of los on expense.