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Raul received a score of 70 on a history test for which the class mean was 70 with a standard deviation of 9. He received a score of 72 on a biology test for which the class mean was 70 with standard deviation 8. On which test did he do better relative to the rest of the class?
Some people who work at your company would like to visually compare the income distributions of people who buy various products in order to better understand.
the same six testers rated the taste of two ice creams. taste ratings are not normally distributed so a t-test should
Project was estimated by using ADM/PERT analysis. Due to extensive length of project many activities were combined; Following is the result.
A research group consists of 4 professors and 26 students. A committee is to be formed consisting of 2 professors and 4 students.
His assistant thinks the standard deviation is less than three feet. If the instructor were to conduct a test, what would the null and alternative hypotheses be
Copy the Assignment Data (i.e., cake mix data) to Sheet 1, cells A1:P32, of the new Excel workbook. Enter the following labels in cells A34:A36: Point Estimate, Lower bound of the 95% Confidence Interval, and Upper Bound of the 95% Confidence Inter..
Discuss how the Empirical Rule works and how it relates to the bell curve. Then, explain Chebyshev's Theorem and how it is different from the Empirical Rule.
Home Prices A real estate agency says that the mean home sales price in Spring, Texas, is the same as in Austin, Texas. The mean home sales price for 25 homes in Spring is $127,414. Assume the population standard deviation is $25,875.
Suppose a small bicycle manufacturer makes cheap bikes that sell for 180$ each. The total cost of producing x bikes (in $) is given by c(x)=6000+240x-0.8x^2, where x is up to 200 bikes.
What is the probability that a Hamming-coded 4-bit word (7 total bits) will be correctly interpreted by the receiver?
Use the value of the line correlation coefficient to calculate the coefficient of determination. What does this tell you about the explained variation of the data about the regression line? About the unexplained variation? Calculate the coefficien..
Lice are a pesky problem for school aged children and is unrelated to cleanliness. The lifetimes of lice that have fallen off the scalp onto bedding is approximatley normally distributed with a mean of 2.2 days and a standard deviation of 0.4 days..
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