The volume of a stock is the number of shares traded for a given day. In 2011,
Question:
(a) Draw a histogram of the data. Describe the shape of the distribution.
(b) Draw a boxplot of the data. Are there any outliers?
(c) Based on the shape of the histogram and boxplot, explain why a large sample size is
necessary to perform inference on the mean using the normal model.
(d) Does the evidence suggest that the volume of Starbucks stock has changed since 2014? Use
an a = 0.05 level of significance.
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Related Book For
Statistics Informed Decisions Using Data
ISBN: 9780134133539
5th Edition
Authors: Michael Sullivan III
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