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1. Sketch the approximate shape of the chi-square curve when df = 2 and when df = 100.
2. Why can the chi-square statistic never be negative?
the weights in kilograms of a group of crates being shipped to panama are 95 103 110 104 105 112 and 92. what is the
Customers arrive at the Veryfast Bank as a Poisson process of rate λ customers per minute. Each arriving customer is immediately served by a teller. After being served, each customer immediately leaves the bank.
suppose a compact disk cd you just purchased has 8 tracks. after listening to the cd you decide that you like 4 of the
What are the medians for the 2 data sets? Is there a difference or similarity between the mean and the median? Explain the similarity or difference?
For these data, a 99% confidence interval for true mean weight loss by all patients attending the clinic would have the limits (?, ?).
question grades for ten students are 88 93 83 97 73 88 85 59 73 and 79. determine the followinga. measures of central
rolling a fair eight-sided die produces a uniformly distributed set of numbers between 1 and 8 with a mean of 4.5 and a
In other words, both variables have the same mean but different standard deviations. Draw rough sketches of the two normal curves on the same graph.
The true average gas mileage for this new model, which of the following gives the null and alternative hypotheses that the consumer group should test?
State the degrees of freedom for a two tailed test for zero slope, and use Appendix D to find the critical value at α = .05. (c) What is your conclusion about the slope?
Describe the association between these variables shown in the scatterplot.- Do you think this linear model is appropriate? Use the residuals plot to explain your decision.
Construct one bar graph illustrating the relationship between sales and income for each separate year of Amazon's existence.
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