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STAT 1124 Quiz 2 Model Answers

# STAT 1124 Quiz 2 Model Answers - c What is the sample...

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STAT 1124 Section 2 Name: Quiz 2 Student ID: February 2, 2009 You have 20 minutes to complete the following 1. Given the following table that summarizes a sample: x i x i - xbar (x i - xbar) 2 15.9 -1.45 2.10 16.0 -1.35 1.82 16.4 -0.95 0.90 16.7 -0.65 0.42 16.8 -0.55 0.30 16.9 -0.45 0.20 17.0 -0.35 0.12 17.0 -0.35 0.12 17.1 -0.25 0.06 17.2 -0.15 0.02 17.2 -0.15 0.02 17.3 -0.05 0.00 17.5 0.15 0.02 17.7 0.35 0.12 17.8 0.45 0.20 17.9 0.55 0.30 18.3 0.95 0.90 18.4 1.05 1.10 18.5 1.15 1.32 19.4 2.05 4.20 Count 20 20 20 Sum 347.000 0.000 14.290 a) Choose a graphical tool to represent the data (e.g., histogram, Boxplot, or a Stemplot) ( 3 ) It is not advisable to construct a histogram in this case; it is too time consuming. Boxplot: Min=15.9, Q1=16.85, Median = 17.2, Q3=17.85, Max=19.4

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