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Two randomly selected grocery store patrons are each asked to take a blind test and to state which of the three diet colas (marked as A, B or C) he or she prefers. Draw a tree diagram depicting the sample space outcomes for the test results
Illustrate how critical values associate to the confidence interval using example variable. Explain how margin of error associates to confidence intervals and to ecology.
Discuss how the Empirical Rule works and how it relates to the bell curve. Then, explain Chebyshev's Theorem and how it is different from the Empirical Rule.
A random sample of 95 printers discovered that 20 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small businesses.
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
Is there evidence to suggest that the training course helps out sales people?
Standard deviation of 2.5 minutes. What does Chebyshev's Theorem say about the percentage of employees with commuting times between 58.6 minutes and 68.6 minutes?
No estimate of the population proportion is available. How large a sample is required?
A movie theater owner wanted to know how many people hated commercial at the beginning of movies if less then 10% hated the commercials the he would leave them.
The number of senior citizens (65 and older) in the US in millions n years after 1990 can be estimated using the formula
Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.) Use the five steps of hypothesis testing and explain your findings.
The number of stereos sold on each weekday. State the hypotheses and identify the claim, find the critical value(s), compute the test value, make the decision and summarize the results.
A hypothesis test is performed to test the claim that a population proportion is greater than 0.7. Find the probability of a type II error, β, given that the true value of the population proportion is 0.72. The sample size is 50 and the significan..
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