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4. A manufacturer of pencils is choosing between two pencil making machines. Mac

ID: 3350200 • Letter: 4

Question

4. A manufacturer of pencils is choosing between two pencil making machines. Machine A produces pencils which have a mean length of 6 inches and a standard deviation of 0.1 inch while machine B produces pencils which have a mean length of 6 inches and a standard deviation of 0.4 inch. Which machine should the manufacturer choose and why?

5. Find the mean and standard deviation for the stock prices of each company. Describe the type of investor who should consider buying Orange Computer instead of General Car’s stock.

              Orange            General Car

              Computer         Company

              Stock Price      Stock Price

              40                    40

              42                    39

              38                    40

              52                    43

              36                    43

              40                    45

              48                    46

              50                    50

Explanation / Answer

Solution:-

4) The manufacturer shoukd choose Machine A, although both machine produces the same mean length but the standard deviation of Machine A is less than standard deviation of Machine B.

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