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An automobile manufacturer claims that their jeep has a 48.6 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep. After testing 100 jeeps they found a mean MPG of 42.8.Assume the variance is known to be 5.76. Is there sufficient evidence at the 0.01 level that the jeeps has an incorrect manufacturer's MPG rating?
Step 1. State the hypotheses:
Step 2. Find the value of the test statistic. (Round your answer to 2 decimal places.)
Step 3. Specify if the test is one-tailed or two-tailed.
Step 4. Enter the decision rule
Step 5. Determine the conclusion.
A) Reject Null Hypothesis B) Fail to Reject Null Hypothesis
Determine the population of your city in 10 years. Determine how long until the population of your city doubles assuming a steady growth rate.
Analyze the DT to determine the optimal strategy for the company. What is the expected value of the optimal strategy? Develop a risk profile for the optimal strategy.
A business researcher uses two-way ANOVA in a report for a client. The researcher does not check the assumptions of using the technique.
The researchers planned to use simple linear regression to see if the age at which a baby was first able to crawl could be predicted from the average outdoor temperature six months after each baby's birthdate.
Provide an estimate, standard error, an 80 percent con?dence interval, and a 95 percent con?dence interval for θ.
a. the probability that exactly 20 items will be scanned incorrectly from the next 5,000 items scanned b. the probability that more than 20 items will be scanned incorrectly from the next 5,000 items scanned c. the probability that the number of item..
the board of a pharmaceutical company has eleven members. one board member will be selected as vice president of
1. at your supermarket the typical shopper spends 18.93 with a standard deviation of 12.52. you are wondering what
when a bus service reduces fares a particular trip from new york city to albany new york is very popular. a small bus
Imagine a researcher presented a null hypothesis that in a certain community, the average energy expenditure of residents is at least 2100 calories per day. He randomly sampled 100 residents in that particular community. He computed a negative tes..
Verify the computer"s calculations by checking the interval given for the first sample against your result in (b). Use the x reported by the software. (d) How many of the 25 confidence intervals contain the true mean = 460?
The dean of the Western College of Business must plan the school's course offerings for the fall semester. Students demands make it necessary to offer at least 30 undergraduate and 20 graduate courses in the term. Faculty contract also dictate tha..
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