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Replacement times for CD plater are nomally distrbuted with mean 7.1 years and standard deviation of 1.4years. a) fibd the probability that a randumly selected CD player will have a replacement time less than 8 years.b)If you want to provide a warranty so that only 2% of CD player will be replaced before the warranty expires, what is the tome length of the warranty? c) What is p67?
Explain how much money do these people make each year. Suppose you read in your local newspaper that 45 officials in student services whioch is earned as an average.
The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 82 pounds. A random sample of 150 newly manufactured cables has a mean breaking strength of 1950 pounds.
In which of the following markets do all firms sell the same standardized product?
Suppose you want to know if a new design of a product is actually better than the current product. For example, your design team is working on increasing the speed of the KX Speed Drill
A psychologist interested in political behavior measured the square footage of the desks in the official office of four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations.
If they have a GPA that falls in the range between 2.50 and 3.50, what is their z score and percentage of the area do they fall in?
I believe this can be done by plotting out every 3 years average number of people working past 65 since 1997 until now and then making a predictability study as to number of people who will be working over the age of 65 in 2012.
Create a scatter plot for the data. Determine the correlation coefficient for the data.
If absolute value of test statistic is less than critical value in hypothesis test decision is to?
Let X be the number of calls you need to make until you find your friend. Give the probability mass function for X. How many calls do you expect to make until you find your friend?
A random sample of 5 parks is selected and the number of acres is shown at alpha= 0.05, find the critical value. 944, 1036, 790, 5842,566
Sam Sleep researcher hypothesizes that people who are allowed to sleep for only four hours will score significantly lower than people who are allowed to sleep for eight hours on a management ability test.
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