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The National Center for Health Statistics reports that the mean systolic blood pressure for males 3 to 44 years of age is 128, and the standard deviation in this population is 15. The medical director of a large company looks at the medical records of 72 executives in this age group and finds that the mean systolic blood pressure in this sample is 126.07. Is this evidence that the company's executives have a different mean blood pressure from the general population?
Write out the null and the alternative hypothesis.
What is the appropriate data analysis method for this study?
Calculate the test statistic and effect size.
Make the decision, and explain why.
What is the mode and calculate the unbiased estimate for the population variance - estimate of the population variance of 9.2
Determine the median, and the standard deviation. Determine the coefficient of skewness using Pearson's method. Listed below are the commissions earned ($000) last year by the sales representatives at the Furniture Patch, Inc.
Which shows the production time requirements for the 4 required manufacturing operations and the accounting department's estimate of the profit contribution per bag?
an irs auditor randomly selects 5 tax returns from 42 returns of which 15 contain errors. what is the probability that
A company must hire a new CFO and prepares a final list of five candidates - all are equally qualified. Two of the candidates are members of a minority of a minority group. To avoid bias in the selection of the candidate
What concepts and constructs would you use to study this phenomenon? How might the concepts or constructs relate to explanatory hypotheses? Explain.
Were the frequency distributions used effectively to report the results? Why or why not? Find an example of a presentation of statistics using a frequency distribution(s) from any media source.
At the .05 level of significance, is there convincing evidence that the number of absences per employee has increased?
Test hypothesis that Site B is more successful in initiating acquaintances than Site A. Use alpha = .05.
Using one proportion z test to find whether or not to support the claim - There is little evidence to reject H 0 , therefore they conclude the tvs are 20 pounds on average.
polychlorinated biphenyls pcbs are used in the manufacture of electrical transformers and pose a great danger to health
a water treatment plant needs to maintain the ph of the water in the reservoir at a certain level. to monitor this they
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