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!
Question - Sales and profits. A business analyst was interested in the relationship between a company s sales and its profits. She collected data (in millions of dollars) from a random sample of Fortune 500 companies and created the regression analysis and summary statistics shown. The assumptions for regression inference appeared to be satisfied.
a) Is there a significant association between sales and profits? Test an appropriate hypothesis and state your conclusion in context.
b) Do you think that a company's sales serve as a useful predictor of its profits? Use the values of both R2 and s in your explanation.
There used to be an ad on TV that claimed one toothpaste was proven to be more effective in fighting tooth decay than another. One of statistics professors was interested in the study, and after 6 ads finally got the address to write away for it f..
As a cash manager of a U.S.-based MNC that needs dollars to support U.S. operations, where would you borrow funds for the next 3 months? Explain.
Let X1, X2,... denote an iid sequence of random variables, each with expected value 75 and standard deviation 15. (a) How many samples n do we need to guarantee that the sample mean Mn(X) is between 74 and 76 with probability 0.99?
Dowsing. In a rural area, only about 30% of the wells that are drilled find adequate water at a depth of 100 feet or less.
The answers are not provided properly for b to f Use Excel to Answer the Following Questions The price of a share of stock divided by the company's estimated future earnings per share is called the P/E ratio. High P/E ratios usually indicate "grow..
Test the teachers hypothesis that there is a significant difference between the pre and post tests.
Draw a stem-and-leaf plot for the CDs variable.- Draw a histogram for the CDs variable.- Draw a dotplot for the CDs variable.
Find the probability that the rent is between $2500 and $2650.- Find a rent r such that 90% of all rents are less than r dollars per month. Write a Solution Trail for this problem.
assume that the population standard deviations are equalnbspfor income mutual funds and growth mutual funds. use the
Find the total sample size needed using a two-sided test at the 0.05 level of significance and a statistical power of 80% to detect the alternative hypothesis that the two-year relapse rates in the placebo and the new drug arms are 60% and 40%, re..
What is the difference between a sample and a population? When can the same information (e.g. the age of each of the ten students in our class) be considered both sample data and population data?
Household expenditure for long distance telephone service in City A and average monthly expenditure in City B extends from X to Y, determine the value of X?
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