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In a pulse rate research, a simple random sample of 120 men results in a mean of 80 beats per minute, and a standard deviation of 11 beats per minute. Based on the sample results, the researcher concludes that the pulse rates of men have a standard deviation greater than 10 beats per minutes. Use a 0.10 significance level to test the researcher's claim.
(a) Identify the null hypothesis and alternative hypothesis.
(b) Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit.
(c) Determine the P-value for this test. Show all work; writing the correct P-value, without supporting work, will receive no credit. (d) Is there sufficient evidence to support the researcher's claim? Explain.
The means appear to be very close, but not the variances. (a) At α = .05, is there a difference in variances? (b) Show all steps clearly, including an illustration of the decision rule.
What are the steps of the order of operations? Why is it important that you follow the steps rather than solve the problem from left to right?
on nov 1 2012 there was a florida poll. the poll was of 549 likely florida voters. 47 said they were going to vote
Construct a scatter plot of P-RFM and P-HELM. If drawing the plot by hand, use graph paper to ensure accuracy.
Find the probability that fewer than 10 of those sampled currently have access to online services.
suppose 1568 of 2033 registered voters sampled said they planned to vote for the republican candidate for president.
the random variable x the time to failure in thousands of miles driven of the signal lights on an automobile has a
(a) Show that the uniform topology of a separated uniformity is always Hausdorff. (b) Show that if S has more than one point, a separated uniformity never converges as a filter for its product topology.
The camera department of a large department store sells three different brands of cameras: Proxima, Yakima, and Tetron. Approximately 60% of the cameras sold are Yakimas with Tetrons accounting for 30% of sales and Proxima the remaining 10%.
a study of 35 browns gerbils showed that their average weight was 4.7 ounces. the standard deviation of the population
ANOVA is a powerful statistical test. How does ANOVA differ from other parametric tests? What are the conditions that must be met to use a one-way ANOVA?
The manager of a car wash receives pricing schedule (shown below) from the vendor who supplies soap- and a promise of a 25% shorter lead time for deliveries.
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