(b) Examine the 95% confidence intervals for the four samples shown in the printout. How do the boxplots for the four samples differ? Why should you expect the boxplots to differ?ĩ5% Confidence Intervals for Mean Height of 18-Year-Old Men (Sample size 20) The boxplots and confidence intervals for four different samples are shown in the accompanying figures.
Then we can have Minitab compute a 95% confidence interval and draw a boxplot of the data ( Stat Basic Statistics I-Sample t, with boxplot selected in the graphs). In Minitab, we can simulate the drawing of random samples of size 20 from this population ( Calc Random Data Normal, with 20 rows from a distribution with mean 68 and standard deviation 3). In Problems 13–19, assume that the population of x values has an approximately normal distribution.Ĭritical Thinking: Boxplots and Confidence Intervals The distribution of heights of 18-year-old men in the United States is approximately normal, with mean 68 inches and standard deviation 3 inches (U.S. Do the intervals differ in length? Do the intervals all contain the expected population mean of 68 inches? If we draw more samples, do you expect all of the resulting 95% confidence intervals to contain μ = 68? Why or why not? … Get solutions Get solutions Get solutions done loading Looking for the textbook? How do the boxplots for the four samples differ? Why should you expect the boxplots to differ?95% Confidence Intervals for Mean Height of 18-Year-Old Men (Sample size 20)(b) Examine the 95% confidence intervals for the four samples shown in the printout. The four confidence intervals are(a) Examine the figure.
This problem has been solved: Solutions for Chapter 8.2 Problem 19P: In Problems 13–19, assume that the population of x values has an approximately normal distribution.Critical Thinking: Boxplots and Confidence Intervals The distribution of heights of 18-year-old men in the United States is approximately normal, with mean 68 inches and standard deviation 3 inches (U.S.
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