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A new drug cures 9 of 200 patients suffering from a type of cancer, for which the historical cure rate is 2%. Perform a test to check on the significance of this result, at both 5% and 1% levels of significance. Based on your conclusion, comments on the efficacy of the treatment using this new drug.
A statistics professor plans classes so carefully that the lenghts of her classes are uniformly distributed between 50.0 and 52.0 minutes. find the probability that a given class period runs less than 50.75 minutes.
at a large department store the average number of years of employment for a cashier is 5.7 with a standard deviation
if 70 percent of the population of a large community is in favor of a proposed rise in school taxes using the normal
Alternative hypothesis is that the mean stress score for managers is different from the mean stress score for professors.
Do the sample data provide convincing evidence in support of this claim? Test the relevant hypotheses usingα= 0.05.For purposes of this exercise, assume that it is reasonable to regard the sample as representative of employers in the United States..
(a) Identify the null hypothesis and the alternative hypothesis. (b) Determine the test statistic. Show all work; writing the correct test statistic, with out supporting work, will receive no credit.
We are interested in whether the proportion for males is higher than the proportion for females. Conduct a hypothesis test.
Describe how you would educate personnel about the importance of handwashing and increase handwashing compliance amongst the staff?
Refer to given Exercise about hours of sleep per night for college students. Draw a picture of the distribution. Indicate the locations of the three intervals found in Exercise. Use given Figure for guidance.
Suppose we knew that he was late for the visit. What is the probability that he came by train? Suppose we knew that he was not late for the visit. What is the probability that he came by train?
Test the hypothesis that the mean head injury for each vehicle type is the same at the a=0.01 level of significance.
This table reports the number of abortions, in thousands, for unmarried and married women in the United States in 1990 and in 2000.
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