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The manufacturer of a low-calorie dairy drink wishes to compare the taste appeal of a new formula (formula B) with that of the standard formula (formula A). Each of four judges is given three glasses in random order, two containing formula A and the other containing formula B. Each judge is asked to state which glass he or she most enjoyed. Suppose that the two formulas are equally attractive. Let Y be the number of judges stating a preference for the new formula.
a Find the probability function for Y .
b What is the probability that at least three of the four judges state a preference for the new formula?
c Find the expected value of Y .
d Find the variance of Y.
Given that the battery still works at 20, 000 km, what is the probability it lasts for at least another 40, 000km?
hamil sopa took a random sample of 60 invoices from his years records. the mean value of invoices in this sample was
the weight of the cereal in a box is a random variable with mean 12.15 ounces and standard deviation 0.2 ounce. what
If they stop 40 cars during the first hour, what is the mean of the number of drivers expected to be wearing their seat belts?
The relationship between energy consumption and average car gas mileage, controlling for GDP.
Men the same age have mean height 69 inches with standard deviation 2.7 inches. What is the z-score for a woman who is 6 feet tall?
in a poll of 600 randomly selected subjects 240 answered yes when asked if they planned to vote in a state election.
The managers in a company’s East and West regions were rated on the basis of the company’s evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions. Perform this calcu..
customers arrive to a thrift bank branch according to a poisson distribution at a mean rate 50 customers per hour. the
Do you think the Poisson distribution, which assumes independent arrivals, is a good estimation of arrival rates in the following queuing systems? Defend your position in each case.
the readylite company produces a flashlight in which product managers are trying to decide how long a warranty to
the mean score on a physical fitness test for division i student-athletes is 947 with a standard deviation of 205. if
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