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College Athletics: Graduation Rate. Women Athletes at the University of Colorado Boulder have a long term graduation rate of 67%. Over the past several years, a random sample of 38 women athletes at the school showed that 21 eventually graduated. Does this indicate that the population proportion of women athletes who graduate from the university of Colorado Boulder is now less than 67%. Use a 5% level of significance.
Graph one shows a number of observations that are very spread out but generally trending from the top left of the graph to the bottom right.
Similar survey of student population 10 years ago found that coffee shop was favoured by 20% of students, and pizza and hamburger were each preferred by 40% of the students. Determine the expected frequencies for chi-square test.
Assume that demand for the upcoming weekend is normally distributed with a standard deviation of 30.
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.
Find the probability that a standard normal random variable will assume a value between: Find a z such that 70% of the area is above that value.
An investment counselor would like to meet with 12 of his clients on Monday, but he has time for only 8 appointments. How many different combinations of the clients could be considered for inclusion into his limited schedule for that day?
The article can be on Descriptive Statistics, Probability and the Normal Distribution, Sampling and Sampling Distributions, Regression Analysis, or Time Series Forecasting.
Develop a multiple regression model with categorical variables that incorporate seasonality for forecasting sales using the last three years of data in the Excel file New Car Sales.
Suppose that the thermometer readings are normally distributed with mean of 0° C and a standard deviation of 1.00° C. A thermometer is randomly selected and tested.
Assume the first patient is assigned treatment A, and whenever there is a tie in marginal discrepancy, the next patient is assigned treatment A. Use w0 = 2 and w1 = 1. Show all you work.
Replacement times for new Ford Taurus GL automobiles are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years.
The probability that a randomly selected elementary or secondary school teacher from a city is female is 0.68, holds a second job is 0.38, and is female and holds a second job is 0.29.
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