Question: After the rst exam in a statistics course, Professor Katula surveyed 14 randomly selected students to determine the relation between the amount of time they

After the ﬁrst exam in a statistics course, Professor Katula surveyed 14 randomly selected students to determine the relation between the amount of time they spent studying for the exam and exam score. She found that a linear relation exists between the two variables. The least-squares regression line that describes this relation is y-har = 6.3333x + 53.0298.
(a) Predict the exam score of a student who studied 2 hours.
(b) Interpret the slope.
(c) What is the mean score of students who did not study?
(d) A student who studied 5 hours for the exam scored 81 on the exam. Is this student’s exam score above or below average among all students who studied 5 hours?

Step by Step Solution

★★★★★

3.38 Rating (170 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a Let x 2 in the regression equation 633332 530298 657 S... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

445-M-S-D-A (1085).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

A quiz in a statistics course has four multiple-choice questions, each with five possible answers. A passing grade is three or more correct answers to the four questions. Allison has not studied for...

Determine the equation of the least squares regression line to predict y from the following data. a. Construct a 95% confidence interval to estimate the mean y value for x = 60. b. Construct a 95%...

The final exam in a statistics course has a time limit of 2 hours. Students may not leave the exam room for the first half hour. The amount of time students take to complete the exam is described by...

3. The data in the table are based on the results of a survey comparing the commute time of adults to their score on a well-being test. a. How many adults took the survey? n =2 b. Which variable is...

Help explain and answer 5. After the rst exam in a statistics course, professor surveyed 14 randome selected students to determine the relation between the amount of time they spent studying for the...

1. . Question 37 You wish to determine if there is a linear correlation between the age of a driver and the number of driver deaths. The following table represents the age of a driver and the number...

0 Question 23 B 0/1 pt '0 3 8 99 (9 Details 14% of all college students volunteer their time. Is the percentage of college students who are volunteers larger for students receiving financial aid? Of...

e.com/courses/3345310/assignments/33452124?module_item_id=74932825 Question 32 10% of all Americans suffer from sleep apnea. A researcher suspects that a lower percentage of those who live in the...

Here is a bivariate data set. X y 59 42 80 116 59 73 52 56 84 97 52 10 61 48 60 72 62 39 Find the correlation coefficient and report it accurate to four decimal places. r = Hint: HelpThe following...

Let Mn be the n Ã n tridiagonal matrix whose diagonal entries are all equal to 0 and whose sub- and super-diagonal entries all equal 1. (a) Find the eigenvalues and eigenvectors of M2 and M3...

1.Which of the following are measures of central tendency? Checkall that apply. A.The median B.A sample statistic C.The mode D.The lowest value E. The mean A measure of central tendency is a single...

A tariff is a tax on imported goods. Suppose the U.S. government cuts the tariff on imported flat screen televisions. Using the four-step analysis, how do you think the tariff reduction will affect...

5 A company increasing its credit terms for customers from 1/10, net 30 to 1/10, net 60 will most likely experience: A an increase in cash on hand. B a higher level of uncollectible accounts. C an...

The middle 50% of enrolled freshmen at Washington University in St. Louis had SAT math scores in the range 700-780. What is the probability that a randomly selected freshman at Washington University...

Each year the National Football League (NFL) runs a combine in which players who wish to be considered for the NFL draft must participate in a variety of activities. Go to...

Suppose you live in a town with two hospitals-one large and the other small. On a given day in one of the hospitals, 60% of the babies who were born were girls. Which one do you think it is? Or, is...

PLEASE ANSWER THE BLANKS, ALL THE ANSWERS I RECIEVED WERE INCORRECT We are evaluating a project that costs $832,000. has an eight-year life, and has no salvage value. Assume that depreciation is...

Joe entered into partnership with two others in the establishment of a real estate sales agency. The other two, Sam and Harry, had considerable experience in the real estate business but no money....

pls help asap! show calculations 10 points Save Answer Consider a four-year project with the following information: initial fixed asset investment = $375,000; straight-line depreciation to zero over...