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Describe a 5-step hypothesis test of multiple means (using the one-factor or the two-factor ANOVA test process) for a particular claim related to your work or life environment. You need to state the claim, define the null and alternate hypotheses, identify the test significance and the test statistic, and state the decision rule that will be used. The decision rule may be based on critical values or on the p-value approach. You do not need to collect data and actually conduct the test calculations unless you wish to do so.
A teacher wants to know if students in her biology class did significantly better on an exam after instruction using authentic learning. The scores pre and post test are listed below. Based on an α = .05, what can the teacher conclude?
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
In order for the blood glucose level of a diabetic to be in the lower 20 percent of all diabetics, that person's blood level must be less than what value?
Determine the critical path and project completion time.
Founder of modern probability and statistics theory Cardano asserted that if one throws a die three times the chance that a given number will show at least once is 50 percent. This is now recognized as the wrong answer. Calculate, what is a probab..
A flour manufacturer packs flour into paper bags, each of which is supposed to hold 10 pounds, or 160 ounces. Some customers have complained that the bags hold only 9.5 pounds, or 152 ounces.
Assuming the nurses surveyed were a random sample from the population of all nurses in the United States, we can use these data to test the null hypothesis H0 that there is no association between the row and column variables in this two-way table...
In the following questions, you should demonstrate your understanding of sampling distribution:
Bill heats his house with natural gas. The gas usage is measured in therms (T). In January of 2007 he used 125 therms over 34 days (D) and the average temperature (T) was 49 degrees farenheit.
What is the 95% confidence interval for the mean number of microwaves sold at a retail store in the chain last week?
He finds their mean weight to be 17.78 ounces with a standard deviation of 0.4 ounces. Are the cereal boxes lighter than they should be? Let α = 0.01.
In a poll of 1049 adults, it was found that 21% smoked cigarettes in teh past week. Use a 0.05 significance level to test the claim that less than 25% of adults have smoked within the past week.
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