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gabriella1232002
11.02.2020 •
Mathematics
A recent survey of 50 executives who were laid off during a recent recession revealed it took a mean of 26 weeks for them to find another position. The standard deviation of the sample was 6.2 weeks. Construct a 95 percent confidence interval for the population mean. (Round your answers to 2 decimal places.)
The confidence interval is between and
Is it reasonable that the population mean is 28 weeks?
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Ответ:
95% Confidence interval: (24.24 ,27.76)
The population mean 28 weeks is not reasonable.
Step-by-step explanation:
We are given the following in the question:
Sample mean = 26
Sample size, n = 50
Alpha, α = 0.05
Sample standard deviation, s = 6.2
95% Confidence interval:
Putting the values, we get,
No, it is not reasonable that population mean is 28 weeks because it does not lie in the confidence interval calculated.
Ответ:
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