The relationship between the

“strength” and “fineness” of cotton fibers was the subject of a study that produced the following data.

a. Draw a scatter diagram.

b. Find the 99% confidence interval for the mean measurement of fineness for fibers with a strength of 80.

c. Find the 99% prediction interval for an individual measurement of fineness for fibers with a strength of 75.

Transcribed Image Text:

x, Strength 76 69 71 76 83 72 78 74 80 82 90 81 78 80 81 78 y, Fineness 4.4 4.6 4.6 4.1 4.0 4.1 4.9 4.8 4.2 4.4 3.8 4.1 3.8 4.2 3.8 4.2