STAT 324 Week 4 Quiz

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Week 4 Quiz

Questions

Question 1 Vending-Machine Revenue

(a) Machine 1

(b) Machine 2

The mean daily money for Machine 2 is _____ compared with Machine 1.

The variance of daily money for Machine 2 is _____ compared with Machine 1.

Question 2 Standard Normal R Output

(a) The z-score of the 90th percentile in every normal distribution

(b) pnorm(0)

(d) pnorm(64, 62, 1, lower.tail = FALSE)

(e) qnorm(0.5)

Question 3 Battery Voltages (Notes 4)

(i) Third quartile

(ii) Range of the middle 50%

(iii) Above the label

(iv) Exactly six of ten

Question 4 Sampling Distribution of the Range (Notes 5)

Question 5 Four Pieces of Paper

(a) Representing four different sheets

(b) Comparing distributions

E(Y1) is _____ E(Y2).

SD(Y1) is _____ SD(Y2).

Which sampling distributions are normally distributed?

Question 6 Lumber Weights (Notes 5)

(a) One board

(b) Mean of fifty boards

Distribution shape

Mean of W̄

SD / SE of W̄

Question 7 Hockey-Puck Weights