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The length of time (in seconds) that a user views a page on a Web site before moving to another page is a lognormal random variable with parameters ? = 2.5 and w2 = 1.
a) What is the probability that a page is viewed for more than 10 seconds?
b) What is the length of time that 50% of users view the page?
c) What is the mean and standard deviation of the time until a user moves from the page?
Calculate the adjusted seasonal factors and calculate the payoff and determine the decision the company should make using each of the decision making under certainty criterion
A shop manual gives 6.5 hours as the average time required to perform a 30,000 mile major maintenance service on a Porsche 911. Last month a mechanic performed 11 such services, and his required times were as follows.
If we reandomly select 5 ball with replacement, what is the probability distribution of x-the number of red balls in the sample?
Give an example of a single polynomial with degree 3, whose value is 4 when the variable is equal to 1. Give an example of a single polynomial with degree 3, whose value is 29 when the variable is equal to 2.
Data from a National Health Survey show that men's average weight is normally distributed with a mean of 172 pounds and a standard deviation of 29 pounds.
the mass of a small loaf of bread is normally distributed with mean 500 grams and standard deviation of 20 grams. find
When creating a 99% confidence interval for the true average difference in cholesterol levels by the drug, what is the margin of error?
Find a 90% confidence interval for the population mean weight of all such turtles.
In a certain countrywide school district, a survey of 350 students showed that 28% carried their lunches to school. Find the 95% confidence interval of the true proportion of students who carried their lunches to school.
A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30.
a box contains 10 chips. the chips are numbered 1 through 10. otherwise the chips are identical. from this box we draw
In the mid-1990s, Colgate-Palmolive had developed a new toothpaste for the U.S. market, Colgate Total, with an antibacterial ingredient that was already being successfully sold overseas.
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