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Using your workplace, present or prior, or an organization with which you are affiliated, identify a quantitative and a qualitative variable of interest to you. Set up the hypotheses for the population mean and/or proportion for the variables you have selected, run the hypothesis test, and interpret your output.
You are asked by the owner of the Starshine Motel to develop a customer satisfaction survey to determine the percentage of customers who are dissatisfied with service.
The Minitab output for the Tukey Least Significant Difference multiple comparisons is below. Which means are different and similar
The mean body mass index (BMI) for boys age 12 is 23.6. an investigator wants to test if the BMI is higher in boys age 12 living in new york city.
FedEx and United Parcel Service (UPS) are the world's leading cargo carriers by volume and revenue (The Wall Street Journal, January 27, 2004).
At a 5% level of significance, is there enough evidence from this survey to conclude that more than half of all adults would rather have $100 than a day off?
What is the chi-square goodness of a fit test? What is its purpose? What does it measure? Is there a way of telling when the test is over?
The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the outcomes consistent with the hypothesis proposed by the researchers?
What is the 25th percentile of a X² distribution with 20 degrees of freedom? What symbol is used to denote this value?
If the city manager knows the average salary nationally is $38,300, which test of significance should be used? Why?
Solve the problem: According to police sources a car with a certain protection system will be recovered 94% of the time. Find the probability that 4 of 8 stolen cars will be recovered.
Suppose that among workers exposed to asbestos in a shipyard in 1980, 33 died over a 10-year period from COPD, whereas only 24 such deaths would be expected based on statewide mortality rates. Is the number of deaths from COPD in this group excess..
Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone.
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