A 6-pack of undershirts costs $13.98. This is $3.96 less than the cost of buying 6 individual shirts.
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The 99% confidence interval for the difference between the average years of service between men and women would be = 3.43.
<h3>What is confidence intervals?</h3>Confidence interval is defined as the statistical parameter that is used to know if a set of values would fall within a certain range of population or not.
Using the statistical table, the value of 99% or 0.99 confidence interval has a z-score = 2.576
The standard error that exists between the bothe value = SD/Ö
Where SD = difference between the standard deviations = 8.39 - 4.39 = 4
Where ñ = different between the average years of service = 9.62
Standard error= 4/√9.62 = 4/3.01 = 1.33
The confidence interval = 2.576 × 1.33 = 3.43.
Learn more about confidence interval here:
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