3. In samples of 83 respondents, the mean number of hours worked per week is 39.04, with a standard deviation of 11.5. a. Calculate the value of the standard error with this sample size b. What would standard error become if sample size was increased to 125? c. Describe the difference between the two standard errors and why it happens, in other words, what happened to the standard error when the sample size increases from 83 to 125