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The probability that merchandise stolen from a store will be recovered is 15%. Suppose a random sample of 8 stores, from which merchandise has been stolen, is chosen. _________Find the mean µ of this probability distribution.
the citizens of a certain community were asked to choose their favorite pet. the pie chart below shows the distribution
70 people received a higher score on the second test, 13 a lower score, and 1 received the same score. At the 0.05 significance level, test the claim that the music has no effect on memorization skills.
If a random sample is to be drawn from a population consisting of 5000 sampling units with a variance of 20% and a desired standard error of 1.6%. What is the optimal sample size?
Obvious tests In many cases, hypothesis testing is used when the evidence is obvious. For example, why would you even bother testing if the true mean is 50 ppm?
Determine and evaluate the effect size and comment on the impact of proposed difference. Ask yourself and comment on your level of satisfaction with the "practical" significance of the findings.
Regression equation to predict the dependent variable using multiple regression analysis:
Many newspapers, when reporting results of political polls, say that 'with 95% confidence, the results are in error by no more than ±3 percentage points'.
People in a large population average 60 inches tall. You take a random sample and will be given a dollar for each person in your sample who is over 65 inches tall.
Find out the test statistic P-value, and critical value, and state the final conclusion. The mean IQ score of statistic professors is less than 120. Sample data: n = 46. Suppose that = 17, and the significance level is = 0.05.
When we take the sample of 100 of these average is $500 and SD is $100. (a) Determine statement to make about range $300 to $700?
What is the probability that none of three randomly chosen persons areallergic to this drug . what is the probability that at least one person is allergic to this drug.
The mean to be $19 and the standard deviation to be 6.8. Find the best point estimate of the population mean and the 95% confidence interval of the population mean.
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