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High density lipoprotein (HDL) in healthy males follows a normal distribution with a mean of 50 and a standard deviation of 8.
What proportion of healthy males have HDL exceeding 60?
What proportion of healthy males have HDL between the mean and 60?
What is the 50th percentile of HDL in healthy males?
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the follo..
now that you are familiar with the basic concepts of statistics what are some examples of when you have seen or heard
The associated standard deviations are $ 8. thousand, $ 10. thousand, and $ 2. thousand. Assuming independence of outcomes, find the mean and standard deviation (in thousands of $) of the consultant's total profit from these three projects.
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
a. What decision would maximize expected profits? b. What is the maximum amount that should be paid for a perfect forecast of the economy?
Consider the following stemplot. The mean of the data represented in this stemplot ?
the weekly amount spent for maintenance and repairs in a certain company has an approximately normal distribution with
mr. brown owns two furniture stores. in store 1 the number of sofas sold per week by a salesperson is on average 13 per
You have asked to research the high absenteeism rate in your company. One required analysis is to be by gender. Assume you have been asked to do the study via a survey.
A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought in to the time repairs are completed. A random sample of 12 repair records showed the following repair (in days)
in a study the data you collect is status of disease infection.in a study the data you collect is favorite type of
in a chemical processing plant it is important that the yield of a certain type of batch product stay above 80. if it
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