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A recent study of cardiovascular risk factors reports that 30% of adults meet the criteria of hypertension. if 15 adults are assessed, what is the probabiliy that?
a. exactly 5 meet the criteria for hypertension?
b. none meet the criteria for hypertension?
c. less than or equal to 7 meet the criteria for hypertension?
Find the probability that an eligible voter selected at random will have the following characteristics.
These predictions, however, are not very accurate. Discuss at least three reasons why these predictions may not be accurate and offer three ways in which you can increase the likelihood of accurately predicting your customers' purchases.
Suppose that X represents diameter measurements from a gamma distribution with a mean of 3 mm and a variance of 1.5 mm^2.
Bay Area University enrolls MBA students in three cohort programs: Weeknight, Saturday, and Distance. Dean Ed Epstein wants to know if there is a difference in the average of the students in the three programs.
Listed below is the selling price for a share of Coca Cola, at the close of the year. Determine the least squares trend equation.
A survey showed that 24% of college students read newspapers on a regular basis and that 81% of college students regularly watch the news on TV. The survey also showed that 21% of college students both follow TV news regularly and read newspapers ..
If the observed value is 4, the expected value is 5, and the standard error is 4, then the test value used for the z test is equal to
At a .10 level of significance, use Stat Tools (or Excel) to test the sponsors' hypothesis. State the null and the alternative hypotheses and the decision rule. Finally, discuss your findings.
Is there evidence of difference in mean life of bulbs produced by the two kinds of machines. What is your conclusion?
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
Of the 250 students in a blind taste test, 150 (60%) preferred Milwaukee's Best over Natural Light. Then the 90% confidence interval for the student population proportion preferring Milwaukee's Best is:
A statistical analysis of 1,000 long-distance calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distributed with μ = 240 seconds and σ = 40 seconds.
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