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 76 69 71 76 83 72 78 74 80 82 y, Fineness 4.5 4.5 4.5 4.0 3.9 4.0 4.8 4.9 4.1 4.3 (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 75. Lower Limit   Upper Limit   (c) Find the 98% prediction interval for an individual measurement of fineness for fibers with a strength of 75. Lower Limit   Upper Limit

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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 76 69 71 76 83 72 78 74 80 82
y, Fineness 4.5 4.5 4.5 4.0 3.9 4.0 4.8 4.9 4.1 4.3
(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 75.
Lower Limit  
Upper Limit  

(c) Find the 98% prediction interval for an individual measurement of fineness for fibers with a strength of 75.
Lower Limit  
Upper Limit  

 

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