Question

Bobs ascots for the last exam was z=1.0 In professor Marge Innoveras statistics class. bob said “oh,good, I did better than 90% of the class.”

Bob's z-score for the last exam was z = 1.0 in Professor Marge Innovera's statistics class. Bob said, "Oh, good, I did better than 90% of the class." Assuming a normal distribution of scores, is Bob right? Select one: a, Yes b. No c. Need to know the sample size to answer this. on red What is the variance of this sample? 4, 14,6,9,21, 3,7,10 out of 1 on Select one: a. 34.79 o b. 20.56 c. 15.12 d. 5.90 e.6.35

Answer 1

8) (a)

Here we have to calculate the sample variance based on the 8 observations. The given data is denoted by the variable 'X'.

Given that n = 8

7) (c)

Here we should know the sample size.