Treat the data obtained in the Sullivan Statistics Survey as a simple random sample of adult Americans.
Question:
(a) Draw a histogram of the data and comment on the shape.
(b) Draw a boxplot of the data.Are there any outliers?
(c) Based on the results to parts (a) and (b),explain why a large sample size might be desirable to construct a confidence interval for the mean monthly cell phone bill.
(d) Use statistical software to determine the point estimate of the mean monthly cell phone bill.
(e) Use statistical software to construct a 95% confidence interval for the mean monthly cell phone bill.
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a The histogram is skewed right b The boxplot shows three outliers c Since ...View the full answer
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