A random sample of 49 statistics examinations was taken. The average score, in the sample, was 84
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Question:
A random sample of 49 statistics examinations was taken. The average score, in the sample, was 84 with a variance of 12.25. The 95% confidence interval for the average examination score of the population of the examinations is
| a. | 80.07 to 87.93. | |
| b. | 80.5 to 87.5. | |
| c. | 83.45 to 84.55. | |
| d. | 83.29 to 84.71. |
Would you show me the process to the answer? I am not getting this but 84.98 and 83.02
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