Neighbors kennel uses tenant-days as its measure of activity; an animal housed in the kennel for one day is counted as one tenant-day. during april, the kennel budgeted for 3,000 tenant-days, but its actual level of activity was 2,960 tenant-days. the kennel has provided the following data concerning the formulas used in its budgeting and its actual results for april:

fixed element per month variable element per tenant-day
revenue - $ 27.30
wages and salaries $ 2,900 $ 5.70
food and supplies 400 8.30
facility expenses 9,500 3.80
administrative expenses 6,700 0.40
total expenses $ 19,500 $ 18.20
actual results for april:

revenue $ 82,088
wages and salaries $ 20,112
food and supplies $ 24,418
facility expenses $ 21,538
administrative expenses $ 8,094
the activity variance for net operating income in april would be closest to:

$126 f

$126 u

$364 f

$364 u

Alarge university wanted to study the relationship between completing an internship during college and students' future earning potential. prom the same graduating class, they selected a random sample of 80 students who completed an internship and 100 students who did not complete an internship and examined their salaries five years after graduation. they found that there was a statistically higher mean salary for the internship group than for the noninternship group. which of the following interpretations is the most appropriate? a. there could be a confounding variable, such as student major, that explains the difference in mean salary between the internship and no internship groups. b. we cannot infer anything from these data since the distribution of salaries is likely right skewed. c. you cannot draw any valid conclusions because the sample sizes are different. d. more students should complete internships because having an internship produces a higher salary.