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!
For a random sample of 256 owners of medium-sized cars, it was found that their average monthly car insurance premium for comprehensive cover was R356. Assume that the population standard deviation is R44 per month and that insurance premiums are normally distributed.
(a) Find the 95% confidence interval for the average monthly comprehensive car insurance premium paid by all owners of medium-sized cars. Interpret the result. (Use the z-table.)
(b) Find the 90% confidence interval for the same problem. Interpret the result and compare it to (a).
(c) Compute (a) using Excel's NORMSINV formula to find the z-value.
(d) Use Excel's CONFIDENCE formula to compute (a).
(e) If 3 000 car owners are comprehensively insured by the Sun Insurance company, estimate, with 95% confidence, the total monthly premium income of the company.
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
What is the probability that the 100 randomly selected mangoes have a mean weight less than 14 ounces?
Which of the following survey questions will deliver an unbiased response? Should the city ban smoking in restaurants to protect our children from second hand smoke?
annual per capita consumption of milk is 24.1 gallons. being from the midwest you believe milk consumption is lower
the number of goals scored in a hockey match between the home team x and the visiting team y respectively follows each
Use a calculator with mean and standard deviation keys to verify that the sample mean is x = 5.63 pups with the sample standard deviation s = 1.78 pups. (b) Find a 75% confidence interval for the population.
the line tangent to the graph of
in a random sample of five microwave ovens the mean repair was 80.00 and the standard deviation was 11.50. assume the
Find the probability that a randomly selected student is a nursing major. Find the probability that a randomly selected student is a nursing major given that the student is a male.
The mean number of passengers per flight is 160 with a standard deviation of 20. The aircraft used for the route has 200 seats.
A month later, the reading skills of all 100 students are assessed to determine whether the program was successful. What are the two populations of interest in this study?
given the following table of payoffs use sensitivity analysis to determine at what probability or more you would select
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