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A manufacturer claims that its televisions have an average lifetime of at least five years (60 months) with a population standard deviation of 7 months. 81 televisions were selected at random, and the average lifetime was found to be 59 months. With a=0.025, is the manufacturer's claim supported?
Critical value=
Test value=
Reject or do not reject the null hypothesis=
Summarize the results=
Make a histogram for the r probability distribution.
a researcher wants to know if the amount of calories in a meal from five different restaurants is different. what type
Based on observations of a few third graders in the lunch line, they assess P(P) as 0.75. More convincing evidence that P(P) is .75 would be?
Last school year, student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classificati..
Calculate the expected value of your portfolio and calculate the expected standard deviation of your portfolio.
A recent study of 50 self-service gasoline stations in the Greater Cincinnati' Northern Kentucky metropolitan area revealed that the mean price of unleaded gas was $2.029 per gallon. The sample standard deviation was $0.03 per gallon.
The Wall Street Journal reported some interesting statistics on the job market. One statistic is that 40% of all workers say they would change jobs for "slightly higher pay."
Provide one bar chart for each hospital. This means seven charts for all seven hospitals. Then, provide bar chart to compare data from hospital one with data from other six hospitals.
assume that the actual surgery duration of this operation suite has a sample mean as x70 minutes and standard deviation
An automobile insurance company estimates the following loss probabilities for the next year on a $25,000 sports car:
The controller of Dash Shoes Inc. instructs you to prepare a monthly cash budget for the next three months. You are presented with the following budget information:
in exercise 7 a sales manager collected the following data on xannual sales and yyears of experience. the estimated
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