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At the U.S. Open Tennis Championship a statistician keeps track of every serve that a player hits during the tournament. The statistician reported that the mean serve speed was 100 miles per hour (mph) and the standard deviation of the serve speeds was 15 mph. Assume that the statistician also gave us the information that the distribution of serve speeds was mound-shaped and symmetric. What percentage of the player's serves were between 115 mph and 145 mph?
Explain the difference between mutually exclusive and independent events.
Find two values of the normal random variable with mean 88 and standard deviation 5 lying symmetrically on either side of the mean and covering an area of 0.98 between them.
Find out the area using Normal distribution. As, if Z is a standard normal variable find out the probability that Z lies.
Criticize the following definitions in light of the eight rules for lexical definitions:- Satire is a kind of glass, wherein beholders do generally discover everybody's face but their own.
suppose that the skewness associated with the residuals from a multiple regression of 88 observations is -0.3 and the
Analyze This Thing: What Is a Good Item?there is more of a chance of the low scoring examinees to answer the item.
the question isa smaple of 50 la crosse school district teachers found that 72 had a summer job. find each of of the
The interquartile range and the standard deviation are two different measures of spread. Which measure do you think is more affected by outliers? Explain.
Determine if these data provide sufficient evidence, at the 1% level of significance, to conclude that the mean average sentence length in the document.
Suppose that for their joint p.m.f. p(x, y), it's already known that p(0, 0) = 0:08 and p(1, 1) = 0:48. Find p(0, 1) and p(1, 0) and justify your answer.
For both the Gamma and Beta distribution, find the value of x that maximizes the density function. When is there just one local maximum?
In a survey of 2898 ?adults, 1471 say they have started paying bills online in the last year.
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