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Hypothesis testing using Chi-square Goodness of Fit:
From 1837 to 1932, the United States Supreme Court had 48 vacancies. The table below shows the number of years in which exactly k of the vacancies occurred (208). At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
Number of Vacancies
Number of Years
0
59
1
27
2
9
3
4+
Conduct a hypothesis test using H 0 : σ 2 = .009216 to see whether the sample data indicate that the variability in interest rates changed.
What is the mean and standard deviation of the number preferring the incumbent and what is the probability that more than 68% will favor the incumbent?
What is Peter's median grade point at graduation? What is the shape of the grade point distribution?
what percent of the total number of seeds germinated?
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
In a distribution of scores, the arithmetic mean is 51, the median is 55, and the mode is 62. What is the score, in percentile form, of a subject who does less well than two-thirds of the sample?
Assume that demand for the upcoming weekend is normally distributed with a standard deviation of 30.
Plan the scatter diagram
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
Find the standard error of the difference in sample means,
A pediatrician is interested in studying the effect of Motrin on reducing temperature in young children. Four children with influenza have their temperatures taken immediately before and then 20 minutes after taking a standard dose
The standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was
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