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In 2004 the federal Department of Education reported that, nationally, the proportion of college freshmen that returned to the same school for their sophomore year was 0.69. Suppose we select a random sample of 480 freshmen from across the nation.
Question 1. What is the expected value of the sampling distribution model for the proportion of 480 freshmen that will return to the same school for their sophomore year?
Question 2. What is the standard deviation of the sampling distribution model for the proportion of 480 freshmen that will return to the same school for their sophomore year?
Question 3. What is the probability that the proportion of these 480 freshmen that return to the same school for their sophomore year is less than 0.65?
A researcher is interested in determining the partial correlation between age (X) and attitude towards interracial marriage (X), controlling for place of residence (rural or urban) (W).
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Assume that in a hypothesis test with null hypothesis H 0 : μ = 14.0 at a = 0.05, that a value of 13.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of:
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CPI and Subway Fare Find the best predicted cost of subway fare when the consumer Price Index (CPI) is 182.5 (in the year 2000).
If 20 measurements are taken and their standard deviation is 1.8, is there enough evidence to reject the claim that her standard deviation is within the limit at ∞ = .01?
The following are quality control data for a manufacturing process at Kensport Chemical Company. The data show the temperature in degrees centigrade at five point in time during a manufacturing cycle.
Considering the simple case of linear regression analysis (one dependent and one independent variable) please share a couple of limiting and empowering factors related to this important tool.
What percent of sales representatives earn more than $42,000 per year?
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