9.14. Is there significant difference in speed between the two servers in Example 9.21 on p....

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9.14. Is there significant difference in speed between the two servers in Example 9.21 on p. 263? (a) Use the confidence interval in Example 9.21 to conduct a two-sided test at the 5% level of significance. (b) Compute a P-value of the two-sided test in (a). (c) Is server A really faster? How strong is the evidence? Formulate the suitable hypothesis and alternative and compute the corresponding P-value. State your conclusions in (a), (b), and (c). Note: Data for 9.14 Example 9.21 (COMPARISON OF TWO SERVERS). An account on server A is more expen- sive than an account on server B. However, server A is faster. To see if it's optimal to go with the faster but more expensive server, a manager needs to know how much faster it is. A certain computer algorithm is executed 30 times on server A and 20 times on server B with the following results, Server A 6.7 min Server B 7.5 min Sample mean Sample standard deviation 0.6 min 1.2 min 9.14. Is there significant difference in speed between the two servers in Example 9.21 on p. 263? (a) Use the confidence interval in Example 9.21 to conduct a two-sided test at the 5% level of significance. (b) Compute a P-value of the two-sided test in (a). (c) Is server A really faster? How strong is the evidence? Formulate the suitable hypothesis and alternative and compute the corresponding P-value. State your conclusions in (a), (b), and (c). Note: Data for 9.14 Example 9.21 (COMPARISON OF TWO SERVERS). An account on server A is more expen- sive than an account on server B. However, server A is faster. To see if it's optimal to go with the faster but more expensive server, a manager needs to know how much faster it is. A certain computer algorithm is executed 30 times on server A and 20 times on server B with the following results, Server A 6.7 min Server B 7.5 min Sample mean Sample standard deviation 0.6 min 1.2 min

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