Question: Using software on a data set. Refer to Exercise 6.125 and the DMS odor threshold data. As noted in the exercise, assume s 5 7

Using software on a data set. Refer to Exercise 6.125 and the DMS odor threshold data. As noted in the exercise, assume s 5 7 mg/l. Read the data into statistical software, and obtain the 95%

confidence interval for the mean DMS. Standard Excel does not provide an option for confidence intervals for the mean when s is known.

• JMP users: With data in a data table, select the data in the Distribution platform to get the histogram and other summary statistics. With the red arrow option pull down, go to Confidence Interval and then select Other. You will then find an option to provide a known sigma.

• Minitab users: With data in a worksheet, do the following pull-down sequence: Stat S Basic Statistics S 1–Sample Z.

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