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A distribution of exam scores has μ = 90 and σ = 10. In this distribution, Sharon's score is 9 points above the mean, Jill has a z-score of +1.20, Steve's score is ½ standard deviation above the mean, and Ramon has a score of X = 110. List the four students in order from lowest to highest.
What does a standard deviation measure? Assume you are a manager of a call center. Customer service phone operators are asked to limit their phone calls to 7 minutes if possible.
Estimate the value of torque required when the diameter is 16 mm. Calculate coefficient of correlation between these variables and comment on your prediction.
The number of hours a 100 watt bulb will operate before burning out is approximately normally distributed with standard deviation σ=50.
A consumer group that surveyed a large number of air travelers found that only 103 of 122 people who lost luggage on that airline were reunited with the missing items by the next day. Does this cast doubt on the airline s claim? Explain.
suppose a committee of 3 people is to be selected at random from a group consisting of 6 men adn 4 women. what is the
Students conducted an experiment to determine whether the Belgium-minted Euro coin was equally likely to land heads up or tails up. Coins were spun on a smooth surface, and in 330 spins,180 landed with the heads side up.
Assuming the population standard deviation of the amount spent per owner is $12, construct and interpret a 95% confidence interval for the mean amount spent per owner for an obedience class.
The scatter diagram for data set below is shown. a) given that x= 3.667, sx = 2.5819889, sy= 1.5937377 and r= -0.8894261, find out least -regression line.
A standard deviation of 4,000 miles. The tires carry a warranty for 35,000 miles. a. What proportion of the tires will fail before warranty expires?
Assume the population standard deviation of unoccupied seats for all flights for this airline is equal to 4.103. Find a 90% confidence interval for μ and the mean number of unoccupied seats
Suppose the filling machine operator can fine-tune the process by controlling the standard deviation of the fill. Find a value for s such that the probability that the sample mean is more than 8.05 ounces is 0.05.
Physical Sciences St. Simons Island, Georgia, is a popular vacation destination. Attractions include a salt-marsh tour, a dolphin watch, a golf course.
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