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A sample of households that subscribe to the United Bell Phone Company revealed the following numbers of calls received by each household last week. Determine the mean, median, and standard deviation of the number of calls received.
52, 43, 30, 38, 30, 42, 12, 46, 39, 37, 34, 46, 32, 18, 41, 5
State the Null and Alternative Hypotheses. Determine the test statistic. Determine and interpret the p-value
Twenty times they sold 6 cars, they never sold 7 cars, three times they sold 8 cars and one time they sold 9 cars. Find the probability that at most 4 cars were sold in a week.
Develop a 95% confidence interval for the amount of total itemized deductions for all taxpayers with an adjusted gross income of $52,500 (to the nearest whole number).
What is the sensitivity and specificity of the test? Suppose that 1 out of 500 infants are born with Down's syndrome.
What is the coefficient of determination, and wat is its meaning?
Assume that a sample is drawn and z(α/2) = 1.65 and σ = 35. Answer the following questions. (A) If the Maximum Error of Estimate is 0.04 for this sample, what would be the sample size?
A sample of n=10 in each treatment. For this study, the three samples have SS1=10, SS2=20, and SS3=15. What value would be obtained for MSwithin?
Why is the F distribution important? How do you determine if a significant difference exists among the groups in ANOVA? How do you determine differences between the groups in ANOVA?
Does this sample show sufficient evidence that the private university loan default rate is below the rate for all universities, using a left-tailed = .01. That is, do you reject the null hypothesis?
Evaluate the data below using the Kruskal - Wallis Nonparametric Hypothesis Test. Explain why you chose this particular nonparametric test to analyze your data.
Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis, can we make a geneeral staement about the population base..
What does r 2 of .73 tell us? Is this a strong or weak correlation? How can you tell?
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