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Health officials would like to determine the mean height of 6 year old children to within plus or minus 0.1cm. Results from a previous study found there to be a standard deviation of 1.34cm in heights of 6 year old children. Using a 90% confidence interval, what sample size should be used?
What proportion of the students had scores between 30 and 40?- What is the probability that a randomly selected student would score between 30 and 40?
to estimate the average age of a breast cancer patient a random sample of 17 patients were selected from a large
Draw the model for these IQ scores. Clearly label it, showing what the 68 - 95 - 99.7 Rule predicts about the scores.- In what interval would you expect the central 95% of IQ scores to be found?
Finally, if the true average fill had actually risen to 12.007 ounces, he wanted to be able to detect this 98% of the time with his sampling plan.
Reconsider the Kentucky Derby winning times and speeds from Exercise 9.20. Test whether there is any effect of the categorical factor "Track" (with seven categories) on winning speed, after accounting for year. The full model will have Year and th..
You survey 40 workers at this company and obtain a correlation coefficient of .30 between these two variables. What is the effect size of this correlation?
Excel or Minitab to generate a list of 40 flyers identification numbers so that those identified can surveyed.
Suppose we want to have a polynomial system that is efficient for both sparse and dense polynomials. One way to do this is to allow both kinds of term-list representations in our system. The situation is analogous to the complex-number example of ..
Comment on the changes in the variables scores. The correlation coefficient (r) and the coefficient of determination (r2) found in the Model Summary indicate the strength of the linear trend between the variables.
What is the probability that fewer than 59 CEOs agree that it is attractive to have a joint venture to increase global competitiveness and what is the probability that between 53 and 61 (inclusive) CEOs agree with that assertion?
The probability is 70% that the sample mean will be contained between what two values symmetrically distributed around the population mean?
Using the six-step critical value approach, at the 0.05 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 25 minutes?
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