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The Readylite Company produces a flashlight in which product managers are trying to decide how long a warranty to issue. If the managers believe the life of the flashlight follows a normal distribution with a mean of three years and a standard deviation of six months:
a) What percentage of flashlights sold can they anticipate will be returned within the first two years?
b) What percentage of flashlights sold can they anticipate will be returned within the first three years?
Calculate the probability that a random sample of 40 children's full-length movies produces an average length of 85 minutes or more.
the door on the computer center has a lock which has five buttons numbered from 1 to 5. the combination of numbers that
Find the equation of the Ellipse whose foci coincide with the foci of the hyperbola x^2 - 3y^2 - 2x - 12y + 1 = 0 and whose eccentricity is the reciprocal of that of the hyperbola and sketch both curves.
Suppose n = 4 dog owners are randomly selected. Find the expected number of persons, in the sample, who buy their dog holiday presents.
what is the difference between measures and reperated measures studies. how did we deal with theae differently
the probability that it gets by the first inspector is 0.1. Of those that get past the first inspector, the second inspector will miss 5 out of 10. What fraction of the defective items gets by both inspectors?
In a large population of college-educated adults, the mean IQ is 118 with a standard deviation of 20. What is the probability that a randomly selected adult from this population has an IQ that is greater than 120?
Dinner B which costs $135.30 for dinner submitted by salesperson with mean cost of $117.50 and standard deviation of $30 per dinner?
suppose we roll one die repeatedly and let ni be the number of the roll on which i first appears. find the joint
a sample standard deviation of 1.1%. Using alpha = 0.05, does the analyst have statistical evidence to reject the claim made by the magazine?
the produce manager for a large retail food chain is interested in estimating the percentage of potatoes that arrive on
15 watch between 10 and 15 hrs per week and 10 watch less than 10 hrs per week. Determine whether there is a relationship between education levels and hours spent watching TV.
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