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A sample of 100 people is classified by gender (male/female) and by whether or not they are registered voters. The sample consists of 80 females and 20 males, and has a total of 60 registered voters. If these data were used for a chi-square test for independence, the expected frequencies should have a total of _____ males.
a.) 12b.) 20c.) 40d.) 48
consider the system with components as shown below indicating their failure relationship. the component reliabilities
If you estimate a regression using OLS, but you do not include an intercept, do you know if the mean of the residuals is zero? Explain.
Bob gets tests grades of 86, 92, and 60 He gets an 90 on his final exam. Find the weighted mean if each tests counts for 20%, and the final exam counts for 40% of the final grade.
using one proportion z test to determine whether or not to support the claim.a delivery truck brings in a shipment of
Then, give two examples of correlation which are evaluated in a business environment and discuss the decision made by evaluating the correlation.
Your current sales revenue in the new year is projected to be $505,000. Find the indifference point (the break even point of sales revenue at which the fixed rent and variable rent for a year are the same). Explain which alternative you would acce..
according to the consumer electronics manufacturers association 10 of all u.s. households have a fax machine and 52
A student scores 91 on the midterm exam for physics. Assume the class scores are normally distributed, with a mean of 65 and standard deviation of 15. Into what percentile does this student fall?
For the following data, determine whether or not right-hemisphere damage results in significantly reduced performance on the spatial skills task. Test with alpha set at .05 with one tail. The data are as follows:
The total profit (in dollars) for sales of x rowing machines is given by P(x) = -0.2x^2 + 300x - 200. What is the profit if 500 are sold? For what value of x will the profit be at a maximum?
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
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