Quiz 1 - In Lab Review

Quiz 1 - In Lab Review - Quiz 1 In Lab Review (W08) 1....

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Quiz 1 – In Lab Review (W08) 1. “Statistical thinking will someday be as necessary to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . as the ability to read and write. H. G. Wells (1866-1946) 2 - Class A vs B : An instructor teaches two classes, Class A and Class B (40 students each). The frequency plots for the quiz scores are given below. You find a quiz of a student, but notice they did not circle which class they are in. You will use his/her quiz score to make a decision about the following hypotheses. H 0 : The student is from Class A. H 1 : The student is from Class B. X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 Quiz Score Quiz Score a) What is the direction of extreme for this test? 1-sided to the L 1-sided to the R 2-sided b) Suppose the decision rule were to reject Ho if X = 0 or X = 10. If so, the value of alpha = . . . . . . . . . c) That value of alpha represents the probability of a mistake , namely concluding the quiz is from Class A w h e n i n f a c t , i t w a s f r o m C l a s s B . True False d) Also, you can calculate beta, the probability of a type 2 error. Here, β = . . . . . . . 3 - The data in Study X was not statistically significant at the 5% level. Which of the following p-values could apply? (Circle all that apply) 0.007 0.041 0.098 0.151 4 - Stat 100 Students : For many years, we’ve assumed that only 5% of the Stat 100 students take another statistics class. The Statistics Department believes that this value is too low and decides to take a sample of 20 students out of the 355 students that took Statistics 100 (F05) and determine if they continued their statistical education. a)
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Quiz 1 - In Lab Review - Quiz 1 In Lab Review (W08) 1....

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