Final answer:
To calculate the standard error of the sampling distribution of the mean differences, you need to find the sample mean and sample standard deviation for each group, and then use those values in a formula to calculate the standard error.
Step-by-step explanation:
The standard error of the sampling distribution of the mean differences can be calculated as follows:
- Determine the sample mean for each group.
- Calculate the sample standard deviation for each group.
- Find the square root of the sum of the squared sample standard deviations divided by the sample size.
- Divide the result by the square root of the sample size.
- Round the answer to two decimal places.