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Previously we tested the hypothesis about two means, now we look at testing the hypothesis about several means. By using the ANOVA we can test the hypothesis with a specified value of α. Discuss the process used to reject or fail to reject the null hypothesis when using the ANOVA. Note: specifically discuss the MS (factor) and MS (error).
What are the appropriate H0 and Ha for each of the following research studies? In addition, note whether the hypothesis test is one- or two-tailed.
The population's standard deviation is 2.00 hours per week. Based on a sample of 49 students, Healthy Lifestyles Incorporated (HLI) would like to apply the central limit theorem to make various estimates.
A study of 80 white mice showed that their average weight was 3.7 ounces. The standard deviation of the population is 0.6 ounces.
Compute the length-of-life value for which 10% of the watch's batteries last longer.
A clinical study was performed to determine if a product was effective in alleviating side effects caused by a mode of treatment. In the treated group (100 subjects) it was found that 10% had side effect A, 15% had side effect B and 65% had side eff..
Compute the Mann-Whitney U statistic for the following data. The numbers under the Group 1 and Group 2 columns are participant numbers.
Your textbook recommends a three-step approach to analyzing a data set. Summarize the steps.- Read the nine objectives at the beginning. Responding to them will help you consolidate what you have learned.
Subsequent questions concern other political, social, and election issues. Explain why this question order might be the best order for estimating how people may vote in the presidential election.
Use a 0.05 significance level to test the claim that this sample comes from a population with a married percentage of less than 58.6%.
in a sample of 1000 voters 520 plan to vote for candidate a. find the 95 confidence interval for the percent in favor
To what probabilities do each of the following sigma levels correspond to, based on a standard normal curve: 3 sigma, 4sigma, 5 sigma, and 6 sigma? (Hint: Use the NORMSDIST function in Excel.
Switching banks after a merger. Banks that merge with others to form ‘mega-banks' sometimes leave customers dissatisfied with impersonal service.
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