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A company produces bolts for large-scale construction projects. The shear strength, X, of the bolts is assumed to be a normally distributed variable with a mean strength u=500kg and a standard deviation 10kg. That is, X~N(500, 10). The company decides that they would like to have a warranty policy for which they will be required to replace only 0.25% of the bolts they produce. What minimum strength would need to be specified on their warranty policy to achieve this goal.
Evaluate the functions for the value of x given as 1,2,4,8,and 16. Describe the difference in the rate at which each function changes with increasing value of x; rank the function from fastest-growing to slowest-growing?
of the 89 people who answered yes to a question 8 were male. of the 43 people who answered no to the question 5 were
suppose there is a correlation of 0.87 between the length of time a person is in prison and the amount of aggression
Find the range, standard deviation, and variance for the scores.
The number of degrees of freedom for the appropriate chi-square distribution in a test of independence is:
X, Y, and Z are independent normally distributed random variables. The following information is known about these three variables:
quality control is an important issue at acme company which manufactures light bulbs. in order to conduct testing of
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
a group of men and women between the ages of 25 and 35 were asked how many hours they work last week. do to determine
The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy lasts at least 300 days?
Through the week ending September 16,2011, tiger woods was the leading money winner on the PGA tour with total earnings of $5,517,777. Of the top 10 money winners, 7 players used a title it's brand golf ball. Suppose that we randomly select 2 of t..
Estimate the average score at age 35 for all the individuals who scored 115 at age 18. Predict the score at age 35 for an individual who scored 115 at age 18.
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