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Write a substantive interpretation of the following unstandardized regression equation based on a sample of 743 city residents, where Y is a 10-point scale measuring the number of professional sporting events attended per year. X1 is education, X2 is annual income (divided by $10,000), and X3 is a dummy variable for gender (1=female, 0 = male). The t ratios appear in parentheses.
Y = -8.73 - 0.59X1 + 1.46X2 - 5.40X3(-3.76) (-1.42) (2.14) (-2.87)
Six houses were selected and each appraiser provided an appraisal for each of the six houses. What would be the best statistical test to use for the analysis of this data?
BMI in children is roughtl normally distributed with the mean of 24.5 and standard deviation of 6.2. BMI of 30 or more is considered obese. Determine proportion of children are obese?
Decide whether experiment is binomial, Poisson or neither based on info given. Each week man plays game in which he has a 21% chance of winning.
What IQ score should one have in order to be eligible for Mensa?
Assume the standard deviation of the distribution is 2.5 pounds. Find the probability that the mean of a sample of 55 families will be between 17 and 18 pounds.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots
A machine produces 5-inch nails. A sample of 12 nails was selected and their lengths determined. The results are as follows: State the null and alternate hypotheses. Calculate the mean and standard deviation.
A client has an investment portfolio with mean value is equal to 4500 USD, with a standard deviation of 300 USD. What is the probability that the value of her portfolio is between 3900 USD AND 5400 USD?
The library is to be given 3 books as a gift. The books will be selected from a list of 16 titles. If each book selected must have a different title, how many possible selections are there.
Determine the variance of firm's profit for the month.
4 7 7 5 2 9 7 6 8 5 8 4 1 5 2 8 7 6 6 9. (a) Determine three quartiles and (b) draw box-and-whisker plot of the data.
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