viviansotelo12
05.11.2019 •
Mathematics
In an effort to estimate the mean of amount spent per customer for dinner at a major lawrence restaurant, data were collected for a sample of 49 customers. assume a population standard deviation of $5. if the sample mean is $24.80, what is the 99% confidence interval for the population mean?
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Ответ:
The 99% confidence interval for the population mean is 22.96 to 26.64
Step-by-step explanation:
Consider the provided information,
A sample of 49 customers. Assume a population standard deviation of $5. If the sample mean is $24.80,
The confidence interval if 99%.
Thus, 1-α=0.99
α=0.01
Now we need to determine
Now by using z score table we find that
The boundaries of the confidence interval are:
Hence, the 99% confidence interval for the population mean is 22.96 to 26.64
Ответ:
the answer is b.
40-7= 33