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Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The X column indicates the number of client contacts last month, and the Y column shows the value of sales ($ thousands) last month for each client samples
a. Determine the regression equation.
b. Determine the estimated sales if 40 contacts are made.
In the Arnold's Muffler example for the exponential distribution, the average rate of service was given as 3 per hour, and the times were ex-pressed in hours.
In terms of the standard scores for both sections, the score of which section was better? What are the z-scores for both sections?
Suppose you were to cut up the directory and pull out one listing at random to contact.
Consider the continuous random variable X, which has a uniform distribution over the interval from 20 to 28. The probability that X will take on a value between 21 and 25 is.
If we assume that the errors made by rounding off are iid and have a uniform distribution over the interval ( - ~, ~), compute approximately the probability that the sum of the integers is within two units of the true sum.
Consider a four digit uniform random number generator; as in each of the 10,000 values 0.0000 through 9999 is equally likely. Find the mean and variance of the values produced by such a random number generator.
Find out the probability
If you draw one ball from the urn what is the probability that it is blue or white?
University officials at a major university would like to use three -term moving averages to examine enrollment. Enrollment data (in thousands of students) for the 12 most recent terms are shown in middle column of the table below.
Can we conclude that mean time for game is less than 3.50 hours? Use.05 significance level.
Create a 95% confidence interval for true mean.
Blood type AB is found in only 3% of the population. If 320 people are chosen at random, find the probability of the following. (Round your answers to four decimal places.)
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