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!
A wholesaler has recently developed a computerized sales invoicing system. Prior to implementing this system, a manual system was used. The distribution of the number of errors per invoice for the manual system is as follows
Errors per invoice 0 1 2 3 More than 3
Percentage of invoices 87% 8% 3% 1% 1%
After implementation of the computerized system, a random sample of 500 invoice gives the following error distribution:
Error per invoice 0 1 2 3 More than 3
Number of invoices 479 10 8 2 1
a. Show that it is appropriate to carry out a chi-square test using these data.
b. Use the following Excel output to determine whether the error percentages for the computerized system differ from those for the manual system at the 0.5 level of significance. What do you conclude?
Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
A number of years ago, there was a popular television game show called Let's Make a Deal. The host Monty Hall, would randomly select contestants from the audience and, as the title suggests
The population of SAT scores forms a normal distribution with a mean of µ=500 and a standard deviation of o =100. If the average SAT score is calculated for a sample of n=25 students,
Consider the following data on 20 chemical reactions, with Y = chromatographic retention time (seconds) and X = molecular weight (gm/mole).
A safety engineer claims that only 40% of all workers wear safety helmets when they eat lunch at the workplace. Assuming that his claim is right, find the probability that at most 4 out of 6 workers randomly chosen will be wearing their helmets wh..
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
Suppose you, as the manager of Tennessee Grilled Pork. would like to ensure you have enough cleaning staff for your dining room and would like to analyze data for customers who enter the restaurant to place and order and either eat in the restaura..
At the .10 significance level you will test to determine if there has been an increase in selling time. What is your decision?
Nine percent of undergraduate students carry credit card balances greater than $7,000. Suppose 10 undergraduate students are selected randomly to be interviewed about credit card usage.
Regression equation Credits=15.4-.07. Select the correct statement. Increase in number of hours worked per week increases the expected number of credits.
The management of a regional bus line thought its cost of gas might be correlated with its passenger/mile ratio. Comment on the data and correlation matrix below.
In fitting the simple linear regression model Yi ~ N (α + β xi, σ 2 ) to the following data:
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