Homework SourseIn order to determine whether or not there is a significant
In order to determine whether or not there is a significant difference between the hourly wages of two companies, the following data have been accumulated.
What is standard error of the point estimate of the difference in means?
| Company 1 | Company 2 | |
| sample size | 80 | 60 |
| x bar | 10.80 | 10.00 |
| sigma | 2.00 | 1.50 |
Solution
Note that
standard error = sqrt(s1^2/n1 + s2^2/n2)
Thus, here,
standard error = sqrt(2^2/80 + 1.5^2/60) = 0.2958 [ANSWER, D]
