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【已刪除】2. Independent random samples，each containing 500 observations were selected from two binomial populations. The samples from populations 1 and 2 produced 210 and 320 successes， respectively. Test (16 %)

【已刪除】3. A new weight-reducing technique is tested before its introduction into the market. The weights of a random sample of five people are recorded before they are introduced to this diet. The five individuals are then instructed to follow the diet for 3 weeks. At the end of this period，their weights (in pounds) are again recorded. The results are:Test to determine if this diet is effective at reducing weight. Use a = 0.10. (16%)

4. A random sample of 250 students at a university finds that these students take a mean of 14.7 credit hours per quarter with a standard deviation of 2.2 credit hours. Find the 95% confidence interval for the mean credit hours taken by a student each quarter. (12 %)

【已刪除】5. A company that employs a large number of salespeople is interested in learning which of the salespeople sell the most: those strictly on commission, those with a fixed salary, or those with a reduced fixed salary plus a commission. The previous month’s records for a sample of salespeople are inspected and the amount of sales (in dollars) is recorded for each，as shown in the table. (30 %)Test to determine if a difference exists in the mean sale amounts among the three compensation systems. Test using a = 0.025.

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沒有 【段考】高一數學上學期 權限，請先開通．