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Suppose we analyzed the effect of grade point averages on grades in a specific class and found the results to have an R-aquared value of 0.53. What do we know? Are there other factor, neith or fifty three percent of the variability?
Based on this information, by what factor does the risk of having an accident increase due to driving while intoxicated?
How many variables are there in this study? What are the levels of any variables you identified and what hypothesis test would be used to analyze these data? Justify your answer.
Use the hypergeometric formula to find this probability. The lottery commission also pays if a contestant matches 4 or 5 of the 6 winning numbers. Hint: Divide the 44 numbers into two groups, winning numbers and nonwinning numbers.
Explain in words general pattern of correlation is statistically important.
Determine sample size requirements. When the results are available you would like your margin of error to be plus or minus 5% for the satisfaction measure and plus or minus $1.50 for the spending value.
The lengths of pins produced by a machine follow a normal distribution with mean 2.54 cm and standard derivation 0.04 cm.
In order to control costs, a company wishes to study the amount of money its sales force spends entertaining clients. Compute and interpret the Z score for each of the six entertainment expenses.
Find the range and the standard deviation of the times.
Calculate the probability that the median of the sample or average medians is:
Carryout the ANOVA and, if essential, post-hoc comparisons. Conduct a graph to represent group differences, and interpret ANOVA in a paragraph written in APA style.
Mr. price Home analyzed the value of purchase made on credit by a sample of 25 credit card customers. The simple mean was found to be R170.08 with a sample standard deviation of R21.90. Assume purchase values are normally distributed.
The manager of the Gander Mountain store in Frogtown, IL, believes that his prices for ammunition are lower than the prices of his primary competitor in the hunting equipment market, Cabela's.
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