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!
Quality Motors is an automobile dealership that regularly advertises in its local market area. It claims that a certain make and model of car averages 30 miles to a gallon of gas and mentions that this figure may vary with driving conditions. A local consumer group wishes to verify the advertising claim. To do so, it selects a sample of recent purchasers of this make and model. It asks them to drive their cars until they have used two tanks of gas and to record the mileage. The group then calculates and records the miles per gallon for each car. Following are the results of the tests:
Purchaser Miles per Gallon Purchaser Miles per Gallon
1 30.9 14 27.0
2 24.5 15 26.7
3 31.2 16 31.0
4 28.7 17 23.5
5 35.1 18 29.4
6 29.0 19 26.3
7 28.8 20 27.5
8 23.1 21 28.2
9 31.0 22 28.4
10 30.2 23 29.1
11 28.4 24 21.9
12 29.3 25 30.9
13 24.2
(a) Formulate a statistical hypothesis that accommodates the consumer groupÕs purpose.
(b) Calculate the mean for miles per gallon. Compute the sample variance and sample standard deviation.
(c) Conduct the appropriate statistical test of your hypothesis, using a .05 statistical significance level.
How large a sample should she take to estimate the percentage with a margin of error of no more than 4%, with 90% confidence?
Create a histogram for the following data of the number of miles from residence to place of employment for 30 randomly selected residents of Middletown County.
Provide an example and explain. Why do statisticians play only a limited role in deciding whether statistical significance requires a business action?
How would you interpret the findings of a correlation study that reported a linear correlation coefficient of +0.3?
Computing the probability values using normal distribution - Find the probability that a regular rat (without the supplement) would solve the maze with a score less than or equal to X = 24 errors?
A manufacturer claims that the mean lifetime of its light bulbs is 55 months. The standard deviation of these lifetimes is 6 months. Twenty-two bulbs are selected at random, and their mean lifetime is found to be 56 months.
The Sony corporation produces a Walkman that requires two AA Batteries. The mean life of these batteries in this product is 35.0 hours. The distribution of the battery lives closely follows the normal probability distribtion with a standard deviat..
You and your friends have decided to go to The Kentucky Derby. There are 12 horses in the race. How many ways can the horses come in first, second, or third?
A discussion of extreme weather reports that: "In most states, hurricanes occur infrequently. Yet, when a hurricane hits, the losses can be catastrophic.
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
If there is a difference between the two groups of scores. Briefly explain how the difference may have been caused by the treatments.
Levels of employee motivation in his organization are dropping leading to drop in employee productivity. Draft a research proposal to identify the problem and suggest a methodology for recommending a solution.
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