9.12 A random sample of 10 chocolate energy bars of a certain brand has, on average, 230 calories per bar, with a standard deviation of 15 calories. Construct a 99% confidence interval for the true mean calorie con- tent of this brand of energy bar. Assume that the dis- tribution of the calorie content is approximately nor- mal.

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9.12 A random sample of 10 chocolate energy bars of
a certain brand has, on average, 230 calories per bar,
with a standard deviation of 15 calories. Construct a
99% confidence interval for the true mean calorie con-
tent of this brand of energy bar. Assume that the dis-
tribution of the calorie content is approximately nor-
mal.
Transcribed Image Text:9.12 A random sample of 10 chocolate energy bars of a certain brand has, on average, 230 calories per bar, with a standard deviation of 15 calories. Construct a 99% confidence interval for the true mean calorie con- tent of this brand of energy bar. Assume that the dis- tribution of the calorie content is approximately nor- mal.
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