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Imagine that a student takes a 20-item multiple choice exam. She didn't study, so all of her answers are guesses. Each item on the exam has five possible answers. What is the probability that she would not fail, i.e. she gets at least 60% correct?
Also explain which of the three measures of central tendency would be appropriate for your example, which would be inappropriate, and why.
In your own words, describe the concept of correlation, include the coefficient of correlation (r) and the coefficient of determination (r2) in your description.
The company will replace any printer that fails within 1 year after purchase. What percent of printers can be excpected to fail during the warranty period.
Normal distribution with average 500 and SD 100. A college wants their students to be in the top 12.5% for verbal aptitude. What minimum qualifying score should they set?
Determine the probability that at least 4 of the 155 golfers would get a hole in one on the sixth hole. Discuss
the lifetime of an electronic amplifier is modeled as an exponential random variable. if 10 of the amplifiers have a
The number of items rejected daily by the manufacturer because of defects for last 30 days are:
The 1996 GSS asked, "If husband in family wants children, but wife makes decision that she doesn't want any children. If standard error is 0.01429, determine the 96 % confidence interval for population proportion who would say yes.
If an urn is selected at random and a ball is drawn, find the probability it will be red.
If we are dealing with non-normal data we use Chebychev's Theorem. While not as precise, it does provide some level of utility. If we use Chebychev
Find the average cost of a loaf of bread in your area and compute the cost per day for one year. (Remember that average is the mean, median, mode, and midrange, but choose the best for the data.) 1. What measures of central tendency did you use?
Which of the given signifies difference in two population proportions?
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