STAT 324 Week 5 Quiz

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Week 5 Quiz

Quiz Instructions

Questions

Question 1 (4 points): Matching Distributions

(a) Population histogram

(b) Single-sample histogram

(d) Mean sampling distribution

(e) Standard-deviation sampling distribution

(f) Sum / total sampling distribution

Question 2 (4 points): Total Weight of Fifty Boards

(f1a) Distribution shape

(f1b) Mean of T

(f1c) Variance of T

(f2) Ninety-fifth percentile

Question 3 (5 points): Properties of Sample Means

(a) Mean requires normality

(b) Standard error without normality

(d) Larger samples approach the individual SD

(e) Larger samples make the observed values normal

Question 4 (2 points): Counting Fives

Question 5 (4 points): Cafeteria Ratings

(a) One student

(b) Average of forty students

(d) Required sample size

(e) Middle 95% of sample means

Question 6 (3 points): Hand-Wash Preferences

(a) Expected count preferring the new scent

(b) Expected proportion preferring the original scent

Question 7 (3 points): Simulating Sample Means in R

(A) Initial placeholder values

(B) Number of repetitions

(D) A normal population

(E) A vector of sample means

(F) Strong right skew after averaging