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The annual commissions earned by sales representatives of Machine Products, Inc., a manufacturer of light machinery, follow the normal probability distribution. The mean yearly amount earned is $40,000 and the standard deviation is $5,000.
a. What percent of the sales representatives earn more than $42,000 per year?b. What percent of the sales representatives earn between $32,000 and $42,000?c. What percent of the sales representatives earn between $32,000 and $35,000?d. The sales manager wants to award the sales representatives who earn the largest commissions a bonus of $1,000. He can award a bonus to 20 percent of the representatives. What is the cutoff point between those who earn a bonus and those who do not?
Please state the steps used to perform a hypothesis test on the coefficient of correlation and provide a detailed example. Details are greatly appreciated!
How might one know if an error was made in accepting or rejecting the null hypothesis? Do you suppose the nature of the research has an influence on the selection of the significance level? Why or why not?
A machine is set to produce tennis balls so the mean bounce is 36 inches when the ball is dropped from a platform of a certain height. The supervisor suspects that the mean bounce has changed and is less than 36 inches.
A manufacturer claims that the mean lifetime, mean, of its light bulbs is 52 months. The standard deviation of these lifetimes is 7 months. Ninety bulbs are selected at random, and their mean lifetime is found to be 55 months.
Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.
You are appraising the quality of diamonds for your importer. A diamond without a clear center (opaque center) shall be downgraded and sold at discount.
A researcher is interested in the effect of an electrolytic sports drink on the endurance of adolescent boys. A group of 30 boys is selected and half are given a treadmill endurance test while consuming the sports drink and the other half take the..
What is the probability that a subscriber rented a car during the past 12 month for business or personal reasons?
Determine the optimum solution for the problem.
The intelligence Quotient test scores normally distributed with a mean of 100 and a standard deviation of 15.
The proportion who died from coronary heart disease was .00669 for smokers and .00413 for nonsmokers. Describe the association of smoking each alung cancer.
The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes.
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