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1. An analyst decided to use either the 95% t-interval for the mean or the corresponding 95% interval for the median, whichever was shorter. His sample was symmetric, so the mean and median are roughly the same in his population. What do you think of this approach?
2. You have a very small sample, with n = 1. What is the chance that the median in the population is larger than your single value? Smaller?
Table shows the smoking habits of group college students. If student is selected at random, determine the probability of getting someone who is man or a woman.
Explain the terms parameter and statistics. Make sure the concepts of population and sample are included in the definitions.
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05.
A company that manufactures computer chips wants to use a multiple regression model to study the effect that different variables have on y, the total daily production cost
concepts and applicationsold faithful geyser time intervals in minutes between eruptions of old faithful geyser in
suppose x is a normally distributed random variable with mu 13 and sigma 2. find each of the following probabilities
At the time she was hired as a server at the Grumney Family restaurant, Beth Brigden was told, "You can average more than $20 a day in tips.
a music teacher had noticed that some students went to pieces during exams. he wanted to test whether this performance
Calculate a 95% confidence interval on the average weight of packaged mustard seed. Explain very carefully to the packaging workers what the 95% confidence interval numbers mean. Include your Excel output. Is there anything you would want to note ..
Describe the role of statistics in business decision-making
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
City government has collected the following data on annual sales tax collections and new car registrations: Determine the least squares regression equation.
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