An accounting professor at Middleton University devotes 60 percent of her time to teaching, 30 percent of her time to research and writing, and 10 percent of her time to service activities such as committee work and student advising. The professor teaches two semesters per year. During each semester, she teaches one section of an introductory financial accounting course (with a maximum enrollment of 40 students) and one section of a graduate financial accounting course (with a maximum enrollment of 25 students). Including course preparation, classroom instruction, and appointments with students, each course requires an equal amount of time. The accounting professor is paid $120,000 per year. Determine the activity cost of instruction per student in both the introductory and the graduate financial accounting courses.

Lary got a referral from a school to run an academic motivation program to 4th graders who got low grades in their last year. She wanted to check whether these students are below average for the intelligence level. The mean IQ of her students is 98, SD is 10, and she has 25 students. The average IQ is known as 100.

1. Indicate the null and research hypothesis.
2. What test do you do to test the null hypothesis above, among independent-sample t-test, paired-sample t-test, or one-sample t-test?
3. What is the t-statistics?
4. What is the d.f. for the test?
5. Do you reject the null hypothesis?
6. So, is the average IQ score of her class significantly different from 100?

In a certain college, 33% of all physics students belong to the math club. Explain the method used and calculate the following:

a. Does this scenario meet the criteria of a bimodial probability distribution? Justify your answer by verifying each of the four conditions.

b. If 10 students are selected at random from the physics majors, what is the probability that exactly 6 belong to the math club?

c. If 10 students are selected at random from the physics majors, what is the probability that less than 6 belong to the math club

d. What is the probability that no more than 6 belong to the math club?

e. What is the probability that more than 6 belong to the math club?

f. Address the importance of understanding the terms "less than", "no more than", "greater than"

Suppose that the national average for the math portion of the College Board's SAT is 531. The College Board periodically rescales the test scores such that the standard deviation is approximately 100. Answer the following questions using a bell-shaped distribution and the empirical rule for the math test scores. If required, round your answers to two decimal places.

(a) What percentage of students have an SAT math score greater than 631?

(b) What percentage of students have an SAT math score greater than 731?

(c) What percentage of students have an SAT math score between 431 and 531?

(d) What is the z-score for student with an SAT math score of 630?

(e) What is the z-score for a student with an SAT math score of 395?

Suppose that the national average for the math portion of the College Board's SAT is 520. The College Board periodically rescales the test scores such that the standard deviation is approximately 75. Answer the following questions using a bell-shaped distribution and the empirical rule for the math test scores. If required, round your answers to two decimal places.

(a) What percentage of students have an SAT math score greater than 595?

(b) What percentage of students have an SAT math score greater than 670?

(c) What percentage of students have an SAT math score between 445 and 520?

(d) What is the z-score for student with an SAT math score of 635?

(e) What is the z-score for a student with an SAT math score of 425?

The academic motivation and study habits of female students as a group are better than those of males. The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures these factors. The distribution of SSHA scores among the women at a college has mean 120 and standard deviation 28, and the distribution of scores among male students has mean 105 and standard deviation 35. You select a single male student and a single female student at random and give them the SSHA test.

**No sample size was given

a) Explain why it is reasonable to assume that the scores of the two students are independent.

b) What are the expected value and standard deviation of the difference (female minus male) between their scores?

c) From the information given, can you find the probability that the wom

A K-12 school district needed to estimate the percent of current students who currently owned tablets or laptops to determine if their computer art classes would start assigning digital homework. For a long time, the percent of students with laptops/tablets has held steady at 45%, but the district now thinks that it might be higher than that due to significantly lower technology prices of late. A random sample of 970 current students in the district is selected. It is found that 53% of those in the sample had laptops/tablets. Run a test. 3) Answer the following a) Is this a “proportion of success” or a “means” problem? b) Write the hypotheses. Use proper notation, not words. c) What calculator function are you using? d) What p-value did you get?_________________ What do we compare this to?__________________

Consider this hypothetical example. Facebook is becoming fashionable as a social medium among people, including university faculty and students. Assume the (market equilibrium) annual subscription for facebook per year is $1,200. Many faculty and students are now using it.

a) What are the private benefit to you for using facebook? (Hint: what skills will students acquire from using facebook?)

b) What are the social benefit to the faculty and student community of using facebook?

c) What are the private costs to you for using facebook?

d) What are the social costs to the faculty and student community for using facebook?

e) In your own opinion, do you think facebook would generate positive or negative externalities in the university community? Explain!

f) Should the university subsidize or tax the faculty and student use of facebook?

Problem 2-23

Suppose that the national average for the math portion of the College Board's SAT is 525. The College Board periodically rescales the test scores such that the standard deviation is approximately 100. Answer the following questions using a bell-shaped distribution and the empirical rule for the math test scores.

If required, round your answers to two decimal places.