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The caloric consumption of 43 adults was measured and found to average 2,147. Assume the population standard deviation is 269 calories per day. Construct confidence intervals to estimate the mean number of calories consumed per day for the population with the confidence levels shown below.

a. 91%
b. 96%
c. 99% and an upper limit of a.

The 91% confidence interval has a lower limit of___________

Sagot :

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