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!
One of the major measures of the quality of service provided by any organization is the speed with which it responds to customer complaints. A large family-held department store wished to study this part of their customer service for each department. For the 50 complaints made to the carpeting department last year, the following data represent the number of days between the receipt of the complaint and its resolution.
54 5 35 137 31 27 152 2 123 81 74 27 11 19 126 110 110 29 61 3594 31 26 5 12 4 165 32 29 28 29 26 25 1 14 13 13 10 5 274 52 30 22 26 36 20 23 33 68
The carpeting department supervisor claims that the average number of days between the receipt of a complaint and its resolution is 20 days or less.
a. What are the null and alternative hypotheses for testing whether the installation supervisor's claim is valid?
b. Using the data above, carry out that test for a significance level of 5% and for a significance level of 1%
If and are the proportions of all college males and females correspondingly, who worked last summer, the z statistic (±0.01) for a test comparing the proportions of college men and women who worked last summer is??
The manager requires the estimate to be within 1.0 minutes of the population value. What sample size is needed?
Using the letter M for male and F forfemale. Define a second sample space S and where the elements represent the number of females selected.
Write the null and alternative hypotheses you would use to test the following situation.
1) What is correlation? 2) What is an example of two variables that are likely to be correlated because they are both changing over time?
In the solution to this problem, what is n? p? q? Does it appear that both np and nq are larger than 5? Why is this an important consideration?
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
At.01 significance level, can we conclude that 30-year mortgage rate for small banks is less than 6%? Evaluate the p-value.
A particular medical operation proves fatal in 1% of the cases. Find an approximation to the probability that there will be at least 2 fatalities in 200 operations.
In the real world, a given null hypothesis is false; but the collected data lead to the null hypothesis being accepted. That is, the data lead to a failure to reject the null hypothesis.
At a 5% level of significance, is there sufficient evidence that the population mean waiting time is now less than 3.7 minutes?
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
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