In: Statistics and Probability
The relationship between "strength" and "fineness" of cotton fibers was the subject of a study that produced the following data. (Give your answers correct to two decimal places.)
x, Strength | 75 | 87 | 70 | 78 | 74 | 75 | 86 | 71 | 71 | 70 |
y, Fineness | 4.4 | 3.9 | 4 | 4.5 | 3.8 | 4 | 4.1 | 3.7 | 4.9 | 4.9 |
(a) Draw a scatter diagram. (Do this on paper. Your instructor
may ask you to turn in this work.)
(b) Find the 90% confidence interval for the mean measurement of
fineness for fibers with a strength of 73.
Lower Limit | |
Upper Limit |
(c) Find the 99% prediction interval for an individual measurement
of fineness for fibers with a strength of 73.
Lower Limit | |
Upper Limit |