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1. Despite any problems it might have, summarize how you would justify using Student's t-test to compare two independent groups.
2. Summarize any practical concerns about Student's t-test and comment on how they might be addressed.
If a member of this senior class is selected at random, find the probability that the student a) smokes but does not drink alcoholic beverages; b) eats between meals and drinks alcoholic beverages but does not smoke; c) neither smokes nor eats bet..
If I had 6600 wigets, how many do I have to test with 0 failures to show 95% of them are acceptable with a 95% confidence?
Starting in 2008 an increasing number of people found themselves facing mortgages that were worth more than the value of their homes.
Show how to figure the significance level, the test statistic, and the critical values from this test.
Determine if there is evidence to conclude that the mean number of vacations taken by married individuals is less then the number taken by single/divorced individuals using data in Excel file vacation survey.
A company's manufacturing process uses 500 gallons of water at a time. A "scrubbing" machine then removes most of a chemical pollutant before pumping the water into a nearby lake. To meet federal gregulations the treated water must not contain more t..
For the current year, Packers Company decided to switch from the indirect method to the direct method for reporting cash flows from operating activities on the statement of cash flows. Will the change cause the amount of net cash flow from operati..
a correlation coefficient has an associated probability value of .02 then1. the results are important2. the hypothesis
In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents
the data in the excel spreadsheet linked below indicate the selling prices of houses located on corner lots corner-lot
A researcher used stepwise regression to create regression models to predict BirthRate (births per 1,000) using five predictors: LifeExp (life expectancy in years), InfMort (infant mortality rate).
Is there sufficient evidence to suggest that the parts are not meeting the target diameter? Use the p-value method to conduct an appropriate hypothesis test at the 5% level of significance. Comment on the validity of your conclusion.
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