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The heights of people of the same sex and similar ages follow a Normal distribution reasonably closely. Weights, on the other hand, are not Normally distributed. The weights of women aged 20 to 29 have mean 141.7 pounds and median 133.2 pounds. The _rst and third quartiles are 118.3 pounds and 157.3 pounds. What can you say about the shape of the weight distribution? Why?
1) Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
Since purchasing the software the average delivery time over twenty delivery days was 8.6 hours. At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
Based on these results, is there significant difference between attitudes for males and for females? Use two tailed test with alpha = .05.
Only 3 reported that their health was excellent. Find the probability that when 13 adults are randomly selected, 3 or fewer are in excellent health.
peter the head of a survey organization is planning to do a survey to estimate the percentage of people who intend to
State the null and alternate hypotheses, the decision rule, find the test statistic, state your decision, and estimate the P value for the following:
One reads that a business school graduate with an undergraduate degree earns more than a high school graduate with no additional education, and a person with a master's degree or a doctorate earns even more.
There is uneasiness that the users of paper coupons are different from the users of e-coupons (coupons disseminated by means of the Internet).
A study of 100 sedentary people in this age group is planned to test whether they have a higher or lower level of plasma glucose then the general population.
How large of a sample would be necessary if no estimate were available for the proportion that support current policy?
A math course has 2 sections. Section one has 55 students of which 10 received an A. Section two has 45 students of which 11 received an A. If a student was chosen randomly from 100 students
If alternate hypothesis mention that m doesn't equal 4,000, determine the rejection region for the hypothesis test?
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