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ashleybarrera2000
27.11.2019 •
Mathematics
Arandom 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 content of this brand of energy bar. assume that the distribution of the calorie content is approximately normal.
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Ответ:
214.389 to 245.611 calories
Step-by-step explanation:
A confidence interval can be constructed as follows:
Lower bound (L):
Upper bound (U):
Where 'X' is the sample mean, 's' is the sample standard deviation, 'n' is the sample size, and Z is the x-score associated with the confidence interval.
In this problem
X = 230; S= 15; n=10; and for a 99% confidence interval, z = 3.291
The upper and lower bounds are:
The confidence interval is 214.389 to 245.611 calories.
Ответ:
8
Step-by-step explanation:
it's just common sense.
Well hope this helped!