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A supplier delivered an order fro 30 electric drills to a store. Due to a faulty component, 10 of the electric drills are defective. What is the probability that the first 3 electric drills sold will be returned because they are defective?
If you select a random sample of 16 cups and are willing to have an α = 0.05 risk of committing a Type I error, compute the probability of a Type II error (β) if the population mean amount dispensed is actually:
Construct the sampling distribution of the proportion of milk chocolate candy bars.
(a) Test the hypothesis that H0 : μ = 44 vs. Ha : μ /= 44 using α = 0.10. Draw a box plot and normal plot for this data, and comment. (b) Find a 90% con?dence interval for the population mean μ. (c) Discuss the meanings of (a) a..
1. urn 1 contains 5 red 4 white and 6 blue marbles. urn 2 contains 12 red 2 white and 3 blue marbles. one urn is chosen
Let X be the cost of the sofa. What is the average cost of a sofa if the advertised sofa is $250 and the more expensive sofa is $ 375?
Two fair six-sided dice are tossed independently. Let X be value of first die, and Y value of second. Find out the expectations of following random variables.
suppose you want to estimate the average number of sick days taken by all employees at a large company during a year.
a certain species of tree has an average life span of 130 ears. a researcher has notice a large number of trees of this
A researcher wishes to test the claim that the average age of lifeguards in Ocean City is greater than 24 years. She selects a sample of 36 guards and finds the mean of the sample to be 24.7 years with a standard deviation of 2 years. Is there evi..
1) What is the probability of exactly 2 people in a group of 10 to have the same birthday?
a rare disease occurs in about 1 out of 1000 people who are similar to you. a test for the disease has sensitivity of
Consequently h(a) is minimized at a = m, and its minimum value is the variance of the probability law.
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