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You need to estimate the mean number of travel days per year for outside salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 42 days.
If you must estimate the population mean within 10 days, how many outside salespeople should you sample? Use the 95 percent confidence level.
How large sample size must be taken to be 95% confident.
In 35 of their stores they sold on the average 430 suits per year with a population standard deviation of 40. What is the test value for their claim?
Last week Sarah had exams in Math and in Spanish. On the math exam, the mean was m = 40 with s = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was m = 60 with s = 8 and Sarah had a score of X = 68. For which class should Sara e..
Determine the Midrange. Determine the Standard Variance. Determine the Standard Deviation
What does null hypothesis for repeated-measures hypothesis test state?
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
Compute the incidence proportion or the risk ratio that compares group 1 to group 0, and compute the Incidence proportion or the risk ratio which compares group 2 to group 0. Then post a summary of your findings.
The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30 individuals with their age (X 1 ) and their gender (X 2 ) (0 if male and 1 if female).
According to Fortune, Missouri is within 500 miles of 44% of all U.S. manufacturing plants 8. If a Missouri company needs parts manufactured in 122 different plants, what is the probability that at least half of them can be found within 500 miles ..
Is this correlation statistically significant? He also found the regression coefficient to be -1.66. Is this regression coefficient statistically significant? Explain why or why not for each.
The nation health department has concerns with the chlorine level of 0.4% mg/mL at a local water park raises to unsafe level.
A multiple choice test has three questions with 5 possible answers (and oly one right answer each). You decide to randomly guess the right answer.
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