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Based on past experience, a telemarketing firm has found that calls to prospective customers take an average of 2.0 minutes, with a standard deviation of 1.5 minutes. The distribution is positively skewed, since persons who actually become customers require more of the caller's time than those who are not home, who simply hang up, or who say they're not interested. Albert has been given a quota of 220 calls for tomorrow, and he works an 8-hour day. Assuming that his list represents a simple random sample of those persons who could be called, what is the probability that Albert will meet or exceed his quota?
scores on the critical reading part of the sat exam in a recent year were roughly normal with mean 501 and standard
Using the 0.05 level of significance, is there evidence that the population mean is above $170?
suppose there are two random variables x and y distributed uniformly over -2ltxlt2 and 0ltylt1. determine
according to the census bureau 3.04 people reside in the typical american household. a sample of 19 households in
suppose we roll one die repeatedly and let ni be the number of the roll on which i first appears. find the joint
The edges of a triangular homesite have lengths of 2x - 1, x, and x + 2. Write an expression for the perimeter of the property.
a clinical trial is run to assess the effects of different forms of regular exercise on hdl levels in persons between
in a hypotheses of h0 mu 7 against the alternative ha mu lt 7 from a normal population with known standard deviation
Suppose that the results of the sample lead to rejection of the null hypothesis. Classify that conclusion as a:
The following data represent scores of 50 students in the applied business statistics test. Prepare the frequency distribution table and the frequency histogram for this data set.
Lakewood Fashions must decide how many lots of assorted ski wear to order for its three stores. Information on pricing, sales. What decision should be made by the conservative?
Displays the number of vacation days
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