# statistics

posted by .

The director of an alumni association for a university wants to look at the relationship between the number of years since graduation and the amount of monetary contribution an alumnus makes to the university. He collects data on 50 alumni who have made contributions this year. The number of years since graduation has a mean of 5.5, and the amount of contribution has a mean of \$132. Based on the least squares regression line fitted to the data, it is found that for every year increase since graduation, the contribution is expected to drop by \$45.

Predict the amount of contribution made by an alumnus who graduated 5 years ago.

• statistics -

lol ubc

• statistics -

x-bar=5.5
y-bar=132
b1=-45

b0=132-(-45x5.5)= 379.5

x=5

y-hat=379.5-45x5 = 154.5

contribution amount= \$154.5

• statistics -

yup ubc

• statistics -

haha ubc

## Similar Questions

1. ### macroeconomics

The decision to start working full time after graduation from high school or go to university as a full time student involves marginal cost/benefit analysis. Discuss the marginal costs and benefits of the decision to enter university …

The director of admissions at a large university says that 15% of high school juniors to whom she sends university literature eventually apply for admission. In a sample 0f 300 persons to whom materials were sent, 30 students applied …
3. ### Ashford University

Teh marketing director collects 36 weekly observations on S,A, and R to estimate the following multiple regression equation. S = a + bA + cR where S, A, and R. are measured in dollars per week.
4. ### Math

A state university wants to increase its retention rate of 4% for graduating students from the previous year. After implementing several new programs during the last two years, the university reevaluated its retention rate. Identify …
5. ### statistics

2. The director of admissions at a large university advises students that the cost of textbooks will average more than \$300 for a typical semester. A random sample of 80 students enrolled in the university shows a sample mean cost …
6. ### statistics

. Do students at various universities differ in how sociable they are?
7. ### Statistics

You are working as an assistant to the dean of institutional research at your university. She wants to survey members of the alumni association who obtained their baccalaureate degrees 5 years ago to learn what their starting salaries …
8. ### calculus

a university alumni group wishes to provide an annual scholarship in the amount of 1500 beginning next year. if the scholarship fund will earn an interest rate of 8%/year compounded continuously, find the amount of the endowment the …
9. ### Accounting

I am doing a report on finding the major challenges in the future of my university with regards to their revenue and expenses. I have to discuss the main financial obstacles faced by the university and explain why each presents problems …
10. ### statistics

Suppose that on a certain examination in advanced mathematics, students from University A achieve scores which are normally distributed with a mean of 625 and a variance of 100, and that students from University B achieve scores which …

More Similar Questions