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slavikrds [6]
3 years ago
12

Thirty randomly selected students took the calculus final. If the sample mean was 89 and the standard deviation was 6.2, constru

ct a 99% confidence interval of the mean score of all students. Assume that the population has a normal distribution
Mathematics
1 answer:
Ede4ka [16]3 years ago
5 0
For the answer to the question above asking <span>If the sample mean was 89 and the standard deviation was 6.2, construct a 99% confidence interval of the mean score of all students. Assume that the population has a normal distribution</span>
z=2.57 cuts off .005 in each tail of the standard normal distribution
99% CI is 89 +/- 2.57(6.2)/sqrt(30)= 89 +/- 2.909, or from 86.09 to 91.91
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Answer:

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When you look from right to left, you can see that w = 2b+a. Using this, we can represent w in terms of l.

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4 years ago
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