The speedjet aircraft corporation has a central materials laboratory. the laboratory has only two users, the large plane department and the small plane department. the following data apply to the coming budget year: year: budgeted costs of operating the materials laboratory for 150,000 to 250,000 technician hours per year: fixed costs per year $ 7,600,000 variable costs $ 75 per technician hour budgeted longminusrun usage in hours per year: large plane department 100,000 technician hours small plane department 60,000 technician hours budgeted amounts are used to calculate the allocation rates. actual usage for the year by the large plane department was 90,000 technician hours and by the small plane department was 110,000 technician hours. if a dualminusrate costminusallocation method is used, what amount of materials laboratory?

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.