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The dean of a business school wishes to form an executive committee of 5 from among the 40 tenured faculty members at the school. The selection is to be random, and at the school there are 8 tenured faculty members in accounting. What is the probability that the committee will contain?
a. None of the accounting faculty?b. at least one of them?
Do these simulated data provide evidence for us to conclude that a difference in the spinal canal cross sectional area exist between the population of subjects with disc hernination and a population of those who do not have disc hernation?
Make up the ages of a group of participants who are freshman, sophomores, juniors, and seniors. You will need the age of 10 participants across each level.
For the following independent random samples, use the z-test and the 0.01 level of significance in testing Ho:u1 = u2 versus H1:u1 = u2.
Multiple choices based on regression analysis - the percentage of variation in the dependent variable explained by the variation in the independent variable
For a hypothesis test about a population proportion or mean, if the level of significance is less than the p-value, the null hypothesis is rejected.
A polling organization plans to sample 1000 adult Americans to estimate the proportion of Americans who think crime is a serious problem in this country. (a) What is the parameter of interest to the polling organization? (b) What will be the stati..
In a hospital, a sample of 8 weeks was selected, and it was found that an average of 438 patients was treated in the emergency room each week. The standard deviation was 16. Find the 99% confidence interval of the true mean. Assume the variable is..
Critically illustrate out the difference between a histogram and a dot plot. When might a dot plot be better than a histogram?
Biologist estimates that 50% of the deer in a region carry a certain type of tick. For a sample of 300 deer selected at random, what is the chance that 155 or fewer deer have this tick?
Surveys 32 currents students discovering that 12 will return for summer school. b. with a 0.95 probability, how large of a sample would have to be taken to provide a margin of error of 3% or less?
What is the z a/2 for a confidence level of 95%, the margin error of this sample and give a 95% confidence interval for the mean weight of boxes produced based on the sample mean of 16.4?
The data are reported in thousands of dollars. The following data represent a ransom sample from the study. Compute the sample correlation coefficient r. Give a brief explanation of the meaning of this value.
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