Research psychologists measured the baseline breathing patterns-the total ventilation (in liters of air per minute) adjusted for body size-for each of n = 30 patients, so that they could estimate the average total ventilation for patients before any experimentation was done. The data, along with some MINITAB output, are presented here:

Stem-and-Leaf Display: Ltrs/min
Stem-and-leaf of Ltrs/min N = 30
Leaf Unit = 0.10

Descriptive Statistics: Ltrs/min

a. What information does the stem and leaf plot give you about the data? Why is this important?
b. Use the output to construct a 99% confidence interval for the average total ventilation for patients.

Transcribed Image Text:

5.23 5.72 5.774.99 5.12 482 5.54 4.79 5.16 5.84 455.14 5.32 496 563 5.92 6.04 5.83 5.32 6.195.70 4.72 5.38 5.48 5.37 4.96 5.58 4.67 517 6.34 6.58 4.35 5.63 3 7913579 79135781 356812468035 444455555666 125824417421 1(11 Variable N N*e SE Mean StDev Ltrs/min 30 0.0997 0.5462 03 Maximum 6.5800 0 5.3953 Minimum 01 Median 4.3500 4.9825 5.3750 5.7850