Question

A chemistry class had two tests. On the first test the mean score was 70 with...

A chemistry class had two tests. On the first test the mean score was 70 with a standard deviation of 10. On the second test the mean score was 60 with a standard deviation of 15. The correlation coefficient between the scores of the two tests was r = 0.6. We run a regression analysis with the first test score as the independent variable and the second test score as the dependent variable. We use the result to estimate the score on the second test for each student based on their score on the first test. For at least 75% of the students in the class, the regression estimated score for the second test will be correct to within how many points?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
6. A math teacher gives two different tests to measure students' aptitude for math. Scores on...
6. A math teacher gives two different tests to measure students' aptitude for math. Scores on the first test are normally distributed with a mean of 23 and a standard deviation of 4. Scores on the second test are normally distributed with a mean of 64 and a standard deviation of 10. Assume that the two tests use different scales to measure the same aptitude. If a student scores 29 on the first test, what would be his equivalent score...
Scores of students in a large Statistics class test are normally distributed with a mean of...
Scores of students in a large Statistics class test are normally distributed with a mean of 75 points and a standard deviation of 5 points.Find the probability that a student scores more than 80 pointsIf 100 students are picked at random, how many do you expect to score below 70 points?If top 10% of students obtain an A grade, how much should a student obtain to get an A grade.Suppose four students are picked at random, find the probability that...
The scores on a certain test are normally distributed with a mean score of 70 and...
The scores on a certain test are normally distributed with a mean score of 70 and a standard deviation of 3. What is the probability that a sample of 90 students will have a mean score of at least 70.3162?
Students do two tasks in a general chemistry class. These tasks scores show student performance on...
Students do two tasks in a general chemistry class. These tasks scores show student performance on a scale of 0 to 100, with higher numbers indicating better performance. Task 1: Scores on task 1 were normally distributed with a mean of 75 and a standard deviation of 5. Task 2: Scores on task 2 were normally distributed with a mean of 80 and a standard deviation of 2.5. Mia earned a 75 on task 1. What percentage of students did...
For an Economics test the mean score is 100 and the standard deviation is 10, and...
For an Economics test the mean score is 100 and the standard deviation is 10, and for an Accounting test the mean score is 50 and the standard deviation is 4. You are given the test scores of a student who took both tests. Determine on which test the student had a better score. Enter E if the student did better on the Economics test Enter A if the student did better on the Accounting test Enter S if the...
In a statistics course, a linear regression equation was computed to predict the final-test score from...
In a statistics course, a linear regression equation was computed to predict the final-test score from the score on the first quiz. The resulting equation was: ˆy = 25 + 0.84x with a correlation of 0.73 where y is the final test score and x is the score on the first quiz. (a) If Carla scored 82 points on her first quiz, what is the predicted value of her score on the final test? (b) The linear regression line predicted...
In Test-1 of Math-120 you scored 85, where the mean score of the class is 70...
In Test-1 of Math-120 you scored 85, where the mean score of the class is 70 and standard deviation = 5. On Math-150 Test-1 you scored 88, where the mean score on that class is 76 and standard deviation = 6. You did comparatively better on which test, Math-120 or Math-150? Show and explain your reasoning with the help of z-score.
In Test-1 of Math-120 you scored 85, where the mean score of the class is 70...
In Test-1 of Math-120 you scored 85, where the mean score of the class is 70 and standard deviation = 5. On Math-150 Test-1 you scored 88, where the mean score on that class is 76 and standard deviation = 6. You did comparatively better on which test, Math-120 or Math-150? Show and explain your reasoning with the help of z-score.
11. The following table shows the class size and the average test score Class Size 15...
11. The following table shows the class size and the average test score Class Size 15 17 18 20 21 24 26 29 Average Test score 85 86 85 82 80 78 75 72 Calculate:                 Coefficient of correlation ( r )                 Coefficient of determination (r2)                 Slope of the regression line                 Intercept of the regression line                 Equation of the regression line                 Predicted value of test score for class size = 22
In this class, one of your 4 test scores is dropped. On the first three tests,...
In this class, one of your 4 test scores is dropped. On the first three tests, you have the following scores: 77, 34, and 95. What score do you need on the next test to raise your average (incorporating the dropped test) to 75?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT