Population standard deviation
A score that is 6 points below the mean corresponds to a z- score of z = -0.50. Compute the population standard deviation?
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How many times per year must store order calculators, and in what lot size, to minimize inventory costs? Store must order calculators times per year to minimize inventory costs.
At Ajax Spring Water, half-liter bottle of soft drink is supposed to contain the mean of 520 ml. The filling procedure follows the normal distribution with the known procedure standard deviation of 4 ml.
In a group of 15 batteries 6 are dead. You choose 2 at random. What is the expected number of good batteries?
A study showed that the 32% of all firms in County A are owned by the women. You're phoning local businesses, supposing that the percentage is true in your area. You call three firms. Determine the probability that all 3 are owned by women?
Assume the probability of a customer purchasing 0, 1, 0r 2 books at a bookstore are 0.2, 0.2, and 0.6 respectively. What is the standard deviation of this customers book purchase?
The software company finds that number of copies x , measured in thousands, of its new application. Determine doc/dp when price is $40 per copy.
A consumer organization determines that over a one year period, 18% of cars will need to be repaired once, 7% will need to be repaired twice, and 4% will require 3 or more repairs. If you own two cars, determine the probability that neither will n
Write the cost as the function of number of pounds of coffee they make each day. Two points (-3.5/8) and (2,20) both lie on the graph of a function y=g(x).
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