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1. In a certain part of a city, the average price of homes in 2000 was $148,822, and in 2001 it was $155,908. Suppose these means were based on a random sample of 100 homes in 1997 and 150 homes in 1998 and that the sample standard deviations of sale prices were $21,000 for 2000 and $23,000 for 2001. Find a 98% con?dence interval for the difference in the two population means.
Classify as independent or dependent samples: The average price of gasoline at ten local stations, and the average price of gasoline at ten stations in another state.
question shown below are dollar figures for commercial and industrial loans at all commercial banks in the u.s. as
I am to compute expected values, test stat, use p-value approach and determine critical value with alph at .05
A researcher wanted to invetigate whether there is a significant difference in the average age of instructors, assistant professors, assocated professors and full professors at a university. The faculty was selected at random and their ages were r..
The sample correlation coefficient between x and y is 0.375. It has been found out that the p-value is 0.256 when testing H0: ρ = 0 against the two-sided alternative H1: ρ ≠ 0. To test H0: ρ = 0 against the one-sided alternative H1: ρ > 0 at a sig..
What percentage of the observed variation between the actual values of the dependent variable and the mean value of the dependent variable in the sample data set is explained by the regression model?
a supplier contract calls for a key dimension of a part to be between 1.88 and 2.12 cm. that is a part will not be
The insurance company charges an annual rate of $250 for the collision coverage. What is the expected value of the collision policy holder?
the mean is always the best measure of central tendency to use.truefalseif you use a simple random sample then your
Let A be the event that a student is enrolled in an accounting course, and let S be the event that a student is enrolled in a statistics course.
If one person is arbitarily selected from this sample, determine probability of getting someone who is age 18-22 or doesn't smoke.
multiple choice questions based on multiple regression.1. a regression model between sales y in 1000 unit price x1 in
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