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Acme Veggies conducted surveys in two cities to see what attitudes are like regarding organic vegetables and prices. In city A 75 out of 150 would pay more for organics while in B the result was 80 out of 200.
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha.
b) What does your result say about attitude consistency across cities?
In the history class the mean score was 76 with standard deviation 3.
To evaluate average annual expenses of students on books and class materials sample size 36 is taken.
If the confidence interval limits do not include age below 20 does it mean that motor cyclists under the age of 20 rarely die in crashes?
A professor of math refutes the claim that the average student spends 3 hours studying for the midterm exam. Which hypothesis is used to test the claim?
Standard error for regression equation - determination and non determination and explain the meaning of each.
An experiment consists of flipping the fair coin three times and noting the number of heads and tails. A random variable x is defined to be two times the number of heads plus the number of tails.
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
Find out the probability that temperature of oven will range from 460 to 470 F?
Now make a scatter plot of data from 1982 to 1998 (again, use years since 1800). Determine a linear, power, or exponential model that explains the crude oil production during this time period.
Make your calculation supposing a two-sided two-sample t-test with a type I error (alpha) of 0.056
Determine estimated average starting salary for school with average GMAT of 600 points?
How large a sample is needed to find the population mean within $250 at 99 percent confidence?
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