Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Problem: What's my grade? In Professor Krugman's economics course the correlation between the students' total scores prior to the final examination and their final-examination scores is r =0.5 The pre-exam totals for all students in the course have mean 280 and standard deviation 40. The final-exam scores have mean 75 and standard deviation 8. Professor Krugman has lost Julie's final exam but knows that her total before the exam was 300. He decides to predict her final-exam score from her pre-exam total.
Required:
(i) What is the slope of the least-squares regression line of final-exam scores on pre-exam total scores in this course? What is the intercept?
(ii) Use the regression line to predict Julie's final-exam score.
(iii) Julie doesn't think this method accurately predicts how well she did on the final exam. Use r 2 to argue that her actual score could have been much higher (or much lower) than the predicted value.
Assume that each light bulb works independently of other light bulbs. Determine the probability that all 10 of light bulbs work?
Frequently, tests that yield abnormal results are repeated for confirmation. What is the probability that for a normal person a test will be at least 1.5 times as high as the upper limit of normal on two separate occasions?
What are the final values for x and y for each algorithm?
the door on the computer center has a lock which has five buttons numbered from 1 to 5. the combination of numbers that
the data shows the list and selling prices for homes. find regression equation letting the list price be independent x
how many ways is it possible to observe a sample of n7 observations from a population of n10 observations in which the
the hourly wages in a particular industry are approximately normally distributed with mean 15.00 and a standard
Both intervals were calculated from the same sample data. The confidence level for one of these intervals is 90% and for the other is 99%. Which of the intervals has the 90% confidence level, and why?
According to the National Restaurant Association, 20% of fine-dining restaurants have instituted policies restricting the use of cell phones. From a sample of 100 fine-dining restaurants,
Poll Confidence level. It is common for public opinion polls to have a "confidence level" of 95%, meaning that there is a 0.95 probability that the poll results are accurate within the claimed margins of error.
Suppose the amount of tar in cigarettes is described by a normal model with a mean of 3.5 mg and a standard deviation of 0.5 mg. Find the 25th percentile of the distribution of tar amounts
For the data giben below, prepare a R-chart. Note that the sample size is three.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd