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a company claimts that 9 out of 10 doctors reccomend its brand of cough syrup to their patients. to test this claim against the alternative that the actual proportion is less than 90%, a random sample of doctors was taken suppose the test statistic is z= -1.95. can we conclude that h0 should be rejected at the 1) a=.10 b) a=0.05 c) a= 0.01 level?
Test the claim of the brewery about the mean volume equal to 32 oz. at the 0.05 significance level. It's your choice whether to use z or t.
Select two non-parametric tests utilized in business decision making? Give an example of each test with an appropriate business situation.
Identify a research issue, opportunity, or problem that uses data that has absolute zero measurements. Some examples include a team member's stock portfolios performance
In a research study, what does statistically significant mean? How are decisions made on data based on significance? What do you do with data that is not significantly different?
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
Briefly explain how the standard deviation influences outcome of hypothesis test. How does σ influence measures of effect size?
What is the sample proportion from an American Express sponsored survey that found 355 of 546 business travelers use a laptop computer on overnight business trips?
Let x be amount of May rainfall in local area, and suppose that x is uniformly distributed over interval three to six inches. Write down the formula for probability curve of x.
construct a frequency distribution table for these data. what type of graph would be appropriate to show the frequency distribution for these data?
Suppose that, for our sample, the mean weight is 11 pounds. How con?dent can we be that the population mean is between 10 and 12 pounds?
the observed rate of drinking was the same in both cases although the sample size of the latter was twice as big. The critical region {X ¯>c} and p-value for the two cases are respectively?
Can someone please break these problems down so that I can understand how to get the correct answer.
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