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A professor believes that the final examination scores in statistics are normally distributed. A sample of 40 final scores has been taken. You are given
A professor believes that the final examination scores in statistics are normally distributed. A sample of 40 final scores has been taken. You are given the sample below. The mean of the scores is 83.1 and the standard deviation is 10.38.
56 | 63 | 65 | 68 | 72 | 72 | 73 | 75 | 77 | 78 |
78 | 79 | 80 | 80 | 80 | 80 | 80 | 80 | 81 | 81 |
82 | 84 | 84 | 86 | 86 | 87 | 88 | 90 | 90 | 92 |
92 | 93 | 93 | 94 | 95 | 96 | 97 | 98 | 100 | 100 |
a. | State the null and alternative hypotheses. |
b. | Compute the test statistic for the goodness of fit test. |
c. | At the 1% level using the p-value approach, test the hypotheses. What do you conclude about the distribution of final examination scores? |
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