Applet Exercise Refer to Exercise 7.40. Use the applet SampleSize to complete the

Chapter 7, Problem 7.41

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Applet Exercise Refer to Exercise 7.40. Use the applet SampleSize to complete the following. Use the up/down arrow to the left of the histogram of the population distribution to select the U-shaped distribution. What is the mean and standard deviation of the population from which samples will be selected? a Answer the questions in parts (a) through (e) of Exercise 7.40. b Refer to part (a). When you examined the sampling distribution of Y for n = 3, the sampling distribution had a valley in the middle. Why did this occur? Use the applet Basic to find out. Select the U-shaped population distribution and click the button 1 Sample. What do you observe about the values of individual observations in the sample. Click the button 1 Sample several more times. Do the values in the sample tend to be either (relatively) large or small with few values in the middle? Why? What effect does this have on the value of the sample mean? [Hint: 3 is an odd sample size.]

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