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In a ready-mix plant, cylindrical samples are prepared and tested periodi- cally to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 34 MPa. The compressive strength data shown in Table P1.40 were collected. a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the lower specification limit. Is the plant production meeting the specifica- tion requirement? If not, comment on possible reasons. Comment on the data scatter. TABLE P1.40 Compressive Strength (MPa) Compressive Strength (MPa) Sample No. Sample No. 1 38.6 11 46.1 2 35.4 12 37.6 3 43.8 13 36.4 4 35.8 14 46.2 5 35.77 15 35.8 6 36.1 16 41.5 7 41.1 17 36.7 8 40.5 18 39.0 42.4 19 45.5 10 35.3 20 36.1 During construction of the surface layer of asphalt pavement, two samples were taken every day to measure the asphalt content in the mix to ensure that it is within the specification limits. The target value was set at 5.5% with a tolerance of ±0.4%. The asphalt content data shown in Table P1.41 were collected: a. Calculate the mean, standard deviation, and the coefficient of variation of the data.

In a ready-mix plant, cylindrical samples are prepared and tested periodi- cally to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 34 MPa. The compressive strength data shown in Table P1.40 were collected. a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the lower specification limit. Is the plant production meeting the specifica- tion requirement? If not, comment on possible reasons. Comment on the data scatter. TABLE P1.40 Compressive Strength (MPa) Compressive Strength (MPa) Sample No. Sample No. 1 38.6 11 46.1 2 35.4 12 37.6 3 43.8 13 36.4 4 35.8 14 46.2 5 35.77 15 35.8 6 36.1 16 41.5 7 41.1 17 36.7 8 40.5 18 39.0 42.4 19 45.5 10 35.3 20 36.1 During construction of the surface layer of asphalt pavement, two samples were taken every day to measure the asphalt content in the mix to ensure that it is within the specification limits. The target value was set at 5.5% with a tolerance of ±0.4%. The asphalt content data shown in Table P1.41 were collected: a. Calculate the mean, standard deviation, and the coefficient of variation of the data.

C++ for Engineers and Scientists
C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter3: Assignment, Formatting, And Interactive Input
Section: Chapter Questions
Problem 6PP: (Heat transfer) The formula developed in Exercise 5 can be used to determine the cooling time, t,...
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In a ready-mix plant, cylindrical samples are prepared and tested periodi- cally to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 34 MPa. The compressive strength data shown in Table P1.40 were collected. a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the lower specification limit. Is the plant production meeting the specifica- tion requirement? If not, comment on possible reasons. Comment on the data scatter. TABLE P1.40 Compressive Strength (MPa) Compressive Strength (MPa) Sample No. Sample No. 1 38.6 11 46.1 2 35.4 12 37.6 3 43.8 13 36.4 4 35.8 14 46.2 5 35.77 15 35.8 6 36.1 16 41.5 7 41.1 17 36.7 8 40.5 18 39.0 42.4 19 45.5 10 35.3 20 36.1 During construction of the surface layer of asphalt pavement, two samples were taken every day to measure the asphalt content in the mix to ensure that it is within the specification limits. The target value was set at 5.5% with a tolerance of ±0.4%. The asphalt content data shown in Table P1.41 were collected: a. Calculate the mean, standard deviation, and the coefficient of variation of the data.
Transcribed Image Text:In a ready-mix plant, cylindrical samples are prepared and tested periodi- cally to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 34 MPa. The compressive strength data shown in Table P1.40 were collected. a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the lower specification limit. Is the plant production meeting the specifica- tion requirement? If not, comment on possible reasons. Comment on the data scatter. TABLE P1.40 Compressive Strength (MPa) Compressive Strength (MPa) Sample No. Sample No. 1 38.6 11 46.1 2 35.4 12 37.6 3 43.8 13 36.4 4 35.8 14 46.2 5 35.77 15 35.8 6 36.1 16 41.5 7 41.1 17 36.7 8 40.5 18 39.0 42.4 19 45.5 10 35.3 20 36.1 During construction of the surface layer of asphalt pavement, two samples were taken every day to measure the asphalt content in the mix to ensure that it is within the specification limits. The target value was set at 5.5% with a tolerance of ±0.4%. The asphalt content data shown in Table P1.41 were collected: a. Calculate the mean, standard deviation, and the coefficient of variation of the data.
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