Determining the confidence interval for the mean
4. The owner of a business wanted to test how long employees were spending on the internet. A random sample of 49 employees showed a mean of 42 minutes and a standard deviation of 5.2 minutes. Find a 90% confidence for the mean.© SolutionLibrary Inc. solutionlibary.com 9836dcf9d7 https://solutionlibrary.com/statistics/hypothesis-testing/determining-the-confidence-interval-for-the-mean-7gug
Standard deviation= 5.2 minutes
Sample size= 49
Confidence interval= 90%
Therefore, Significance level= 0.10 = 1-0.9
Population standard deviation (Known, Not Known)= Not Known
No of tails= 2 (This is 2 tailed because we are calculating the ...