STATISTICS FOR BUSINESS 200032.

STATISTICS FOR BUSINESS
200032 DATA SET: 119
[DATE]

DATA SET: 119
Question 1
Computation of 95% confidence interval for employee’s overtime
Population standard deviation is unknown and therefore, t value stat would be used (Harmon,
2015).
It can be concluded with 95% confidence that average weekly overtime for work will lie
within the range of 4.280 and 6.387.
Question 2
Hypothesis testing to check the whether the mean age of employee is more than 30 or not.
1

Significance level (Given) = 0.01
The one tailed p value comes out to be 0.106 which is greater than significance level which
means null hypothesis will not be rejected and alternative hypothesis will not be accepted.
Therefore, it can be said that the mean age of employee is more than 30.
Question 3
Hypothesis testing to check whether the mean salary of male is higher than of female
employees.
There are two independent samples and also the standard deviation is not given which means
the appropriate hypothesis test will be two independent sample t test.
Null hypothesis H0 : μmale ≤ μfemale
Alternative hypothesis Ha : μmale > μfemale
2