(a) Draw a histogram of the data. Describe the shape of the distribution. (b) Draw a boxplot...
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) According to MyStatLab, the mean time students would spend on this assignment nationwide is 95 minutes. Treat the data as a random sample of all Sullivan online statistics students. Do the sample data suggest that Sullivan's students are any different from the country as far as time spent on Section 4.1 goes? Use an α = 0.05 level of significance. Test the hypothesis in the problem given by constructing a 95%confidence interval.
Go to www.pearsonhighered.com/sullivanstats to obtain the data file 10_3_26 using the file format of your choice for the version of the text you are using. The data represent the amount of time students in Sullivan's online statistics course spent studying for Section 4.1-Scatter Diagrams and Correlation.
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a This histogram is unimodal and skewed right b Yes there are a couple of outliers to ...View the full answer
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