Construct a 99 confidence interval on the population mean, Ask an Expert

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A researcher designs an experiment to study the growth of pine trees at an early stage of their development. Towards this objective, a nursery worker records 39 measurements of the heights of 1-year-old pine seedlings. This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet.

1) Make a histogram of seedling heights. Does the data appear to be normally distributed? Explain.

2) Generate a normal quantile plot of height growth. Assess the normality of the height growth distribution using this plot.

3) Construct a 99% confidence interval on the population mean height of all 1-year-old pine seedlings. What are the confidence limits? What statement can be made about the population mean height using the confidence interval?

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