Managing The Springville Herald Continuing its monitoring of the blackness of th

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Managing The Springville Herald Continuing its monitoring of the blackness of the newspaperprint, first described in the Chapter 6 "Managing the SpringvilleHerald" case, the production department of the newspaper wants toensure that the mean blackness of the print for all newspapers isat least 0.97 on a standard scale in which the target value is 1.0.Arandom sample of 50 newspapers was selected, and the blackness ofone spot on each of the 50 newspapers is measured (ans sotred inSH9) 0.854   1.023   1.005  1.030   1.219   0.977  1.044   0.778   1.122   1.114 1.091   1.086   1.141  0.931   0.723   0.934  1.060   1.047   0.800   0.889 1.012   0.695   0.869  0.734   1.131   0.993  0.762   0.814   1.108   0.805 1.223   1.024   0.884  0.799   0.870   0.898  0.621   0.818   1.113   1.286 1.052   0.678   1.162  0.808   1.012   0.859  0.951   1.112   1.003   0.972 Calculate the sample statistics and determine whether there isevidence that the population mean blackness is less than 0.97.Write a memo to management that summarizes your conclusion. Managing The Springville Herald Continuing its monitoring of the blackness of the newspaperprint, first described in the Chapter 6 "Managing the SpringvilleHerald" case, the production department of the newspaper wants toensure that the mean blackness of the print for all newspapers isat least 0.97 on a standard scale in which the target value is 1.0.Arandom sample of 50 newspapers was selected, and the blackness ofone spot on each of the 50 newspapers is measured (ans sotred inSH9) 0.854   1.023   1.005  1.030   1.219   0.977  1.044   0.778   1.122   1.114 1.091   1.086   1.141  0.931   0.723   0.934  1.060   1.047   0.800   0.889 1.012   0.695   0.869  0.734   1.131   0.993  0.762   0.814   1.108   0.805 1.223   1.024   0.884  0.799   0.870   0.898  0.621   0.818   1.113   1.286 1.052   0.678   1.162  0.808   1.012   0.859  0.951   1.112   1.003   0.972 Calculate the sample statistics and determine whether there isevidence that the population mean blackness is less than 0.97.Write a memo to management that summarizes your conclusion.

Explanation / Answer

Given xbar=0.959, s=0.16, n=50 (based on the data) The test hypothesis is Ho:>=0.97 Ha:

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