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Find the required probability for the normal distribution.
A random sample of 1010 U.S. employees was chosen and asked whether the "play hooky", that is, call in sick at least once a year when they simply need to relax; 202 responded "yes". Use this information to set up a 90% confidence interval for the proportion, p of all U.S. employees who play hooky.
Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time.
If 25 men aged 18-24 are arbitrarily chosen, determine probability that their mean serum cholesterol level is between 165 and 200.
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Construct a scatter plot of P-RFM and P-HELM. If drawing the plot by hand, use graph paper to ensure accuracy.
Suppose that this is a simple random sample of adult residents of Maine.
Which of the following events are disjoint and What proportion of the females rated their intelligence less than 7.
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be
Distinct random variable
A pair of dice is rolled. What is the probability of each of the following? (Round your answers to three decimal places.)
Sales manager wishes to award sales representatives who earn the largest commissions a bonus of= $1,000 .He can award bonus to 20% of representatives. Determine cutoff point between those who earn bonus and those who don't?
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
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