Math 533 Quizzes + Final Exam

1. Question: The ages of a group of 50 women are approximately normally distributed with a mean of 47 years and a standard deviation of 6 years. One woman is randomly selected from the group, and her age is observed. 2. Question: Almost all companies utilize some type of year-end performance review ...

1. Question 6.2.4: A random sample of 89 observations produced a mean x̄ = 25.7 and a standard deviation s = 2.5. 2. Question 6.5.67: A company wants to test a randomly selected sample of n water specimens and estimate the mean daily rate of pollution produced by a mining operation. If the company ...

1. Question 7.4.45-T: A professor at a local university conducted a survey of 135 business in a city to determine what motivates small business to export their products. The CEOs were asked to respond to the statement “Management believes that the business can achieve economics of scale be exporti...

Simple Linear Regression Question: From MSL, open data in Excel, then copy x and y variables into correct columns.

1. Question 12.3.4.T: Suppose you fit the first-order multiple regression model y = β0 β1x1 β2x2 Ԑ to n = 25 data points and obtain the prediction equation ŷ = -50.11 5.44x1 1.33x2. The estimated standard deviations of the sampling distributions of β1 and β2 are 0.98 and 0.25 respe...

1. Question: The following numbers represent the weights in pounds of six 7-year old children in Mrs. Jones' second grade class (25, 60, 51, 47, 49, 45). Find the mean, median, mode, variance, and standard deviation. 2. Question: If the variance is 846, what is the standard deviation? 3. Question: I...