Can a pretest on mathematics skills predict success in a, Ask an Expert

Statistics

Can a pretest on mathematics skills predict success in a statistics course? The 82 students in an introductory statistics class took a pretest at the beginning of the semester. The least-square regression line for predicting the score y on the final exam from the pretest score x was y^ = 15.3 + .72x (note: y caret). The standard error of B1 was 0.38.

We wish to test the null hypothesis that there is no linear relationship between the pretest score and the score on the final exam against the two-sided alternative.

a. State the statistical hypotheses.
b. Assuming all assumptions are valid, compute the test statistic.
c. What are the degrees of freedom for this test?
d. What is the p-value?
e. Do you reject or fail to reject the null hypothesis?
f. Write a proper conclusion.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9994896

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Recent test scores on the law school admission test lsat

Recent test scores on the Law School Admission Test (LSAT) are normally distributed with a mean of 162.4 and a standard deviation of 15.9. What is the probability that the mean of 12 randomly selected scores is less than ...

There are 3 orange balls and 17 blue balls that are in a

There are 3 orange balls and 17 blue balls that are in a bag. A person reaches into the bag, without looking, and pulls one of the balls out of the bag. What is the probability that the ball is orange?

A in how many ways can 5 men and women stand in a queue in

(a) In how many ways can 5 men and women stand in a queue in such a way that no two women stand together and no two men stand together? (b) A librarian wants to put 30 different books on 3 shelves, 10 books on each shelf ...

Provide an example of population parameter sample and

Provide an example of population, parameter, sample, and census in a business research project. Why is it important to define the population clearly and precisely in a business research project?

Robertson steel is forecasting the following

Robertson Steel is forecasting the following numbers: EBIT $1,000,000 Interest Expense 300,000 ROE 20% The company is in the 40 percent tax bracket. After putting together the forecast the ...

Bob millers long-term financial goal is to retire

Bob Miller's long-term financial goal is to retire comfortably in 23 years at age 65. You have conducted a robust risk profile analysis on him and have determined that he is an aggressive investor. Miller insisted on all ...

A national center for health statistics report based on

A National Center for Health Statistics report based on 1985 data states that 30 percent of American adults smoke. Consider a simple random sample of 17 adults. Find the probability that the number of smokers in the samp ...

Diastolic blood pressures are approximately normally

Diastolic blood pressures are approximately normally distributed with a mean of 75 and a standard deviation of 10. If we consider samples of 20 patients, what is the 90th percentile of the mean diastolic blood pressure?

One study based on responses from 1016 randomly selected

One? study, based on responses from 1,016 randomly selected? teenagers, concluded that 44?% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than h ...

A company designs a new laptop computer and wants to

A company designs a new laptop computer and wants to investigate customers' preferences with respect to three select laptop features. The features are Price (High vs. low) Processor Speed (Low vs. medium vs. high) Weight ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert