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1. Why are Z scores most often written with two decimal places?
2. What is the Z score for a X value one standard deviation below the mean?
3. Your offspring cam e home with a 105 on a mathematics test that had on a national mean of 105 and a 55 on an English test that had a national mean of 55. On which test did your offspring do better when compared to the other students in who took the test?
The standard deviation of the sample is 5. find the best point estimate of the mean. find the 95% condidence interval of the mean score for all golfers.
Please address the following question: Solve for x. Write your answer as a fraction in simplest form.
a company has estimated that a proposed 10000 investment will generate 3250 for each of the next four years. their
Determine x-bar and s for this data set. You may suppose the values for bulb life are normally distributed. Use traditional method to make your decision.
The scores of the GRE exam are transformed so they have a mean of 500 and standard deviation of 100. The scores are known to be normally distributed. What is the percentage of students that score below 750?
The Queen Mary sails between England and the U.S. Stowaways are sometimes found on board. The ages (years) of stowaways from eastbound and westbound crossings are given below. Eastbound: 24, 24, 34, 15, 19, 22, 18, 20, 20, 17 Westbound: 41, 24, 32..
Test the claim that the mean age of people in the United States who would say yes to the survey question shown in the table is 60 years or older.
Compute the 95% confidence interval for the percent of homeowners who are dissatisfied with their homeowner's insurance policy.
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift.
95% confidence interval evaluate for proportion of Americans who believe Abraham Lincoln is United States' most outstanding President is 65% to 75%. If more precise estimate is requested, then confidence level.
a companys manufacturing process uses 500 gallons of water at a time. a scrubbing machine then removes most of a
What do the coefficients of the regression line tell you about the relationship between mortgage rates and housing starts?
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