Question: 5. The data file OzoneData.txt contains n = 14 ozone measurements (Dobson units) taken from the lower stratosphere, between 9 and 12 miles (15 and

5. The data file OzoneData.txt contains n = 14 ozone measurements (Dobson units) taken from the lower stratosphere, between 9 and 12 miles (15 and 20 km).

Import the data into the R data frame oz, copy the data into the R object x by x=oz$OzoneData, and use R commands to complete the following parts.

(a) Do the normal Q-Q plot for this data, and comment on the appropriateness of the normal distribution as a model for the population distribution of ozone measurements.

(b) Construct a 90% CI for the mean ozone level.

(c) Construct a 90% CI for the median ozone level.

(d) Compare the lengths of the two CIs and comment on the appropriateness of using each of them.

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