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Over the past decade, there has been a strong positive correlation between teacher salaries and prescription drug cost. (a) Do you think paying teachers more causes prescription drugs to cost more? Explain. (b) What lurking variable might be causing the increase in one or both of the variables? Explain.
is there a linear relationship between age and education and if so how strong is that relationship? is it possible to
She then uses the mean and standard deviation of these values to estimate the mean value for all parts the operator is making. Construct a 95% confidence interval for the mean value assuming a normal distribution.
a machine fills cans of soda which are labeled 12 ounces according to a normal distribution with mean 12.1 ounces and
determine if the statements below are true or false. for each statement suggest an alternative wording to make it a
There is not enough information to answer the question, the formula requires knowing the population standard deviation for Mark and Debbie, and we were not given this information.
assume that 67 ofthe cars on a particular freeway are traveling faster than70 miles per hour. arandom sample of 15 cars
Thirty percent of the population in a southwestern community are Spanish-speaking Americans. A Spanish-speaking person is accused of killing a non-Spanish speaking American.
determine if the following data set is a population or a sample the average electric bill for the 50 united states and
Carpet City wants to develops a means to forecast it carpet sale. The store manager believes that the store's sale are directly related to the number of new housing starts in town.
in a study comparing four levels of factor a and two levels of factor b with six observations in each cell the sse3456
question of all the ceos in the citibank walter wriston had the highest disapprovalrating from the internal bankers
suppose there are 4 different bins labled a b c and d.in how many ways can 9 identical indistinguishable billard balls
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