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A mechanical press is used to mold shapes for plastic toys. When the machine is adjusted and working well, it still produces about .08 defective toys. The toys are manufactured in lots of n=100.
Let r be a random variable representing the number of defective toys in a lot. Find the probability that between 7 and 9 defective toys are produced in a lot. Find the probability that between 7 and 9 defective toys are produced in a lot of n = 100 toys. That is, find P (7 <= r <= 9).
An experiment was conducted to determine the effects of three different pesticides (P1,P2,P3) on the yield of three different varieties of citrus tree (V1,V2,V3).
Using the letter M for male and F forfemale. Define a second sample space S and where the elements represent the number of females selected.
Write a brief summary of the distribution of the area of homes.
A large discount chain compares the performance of its credit managers in Ohio and Illinois by comparing the mean dollar amounts owed by customers with delinquent charge accounts in these two states.
The point estimate for the difference between the proportions is:
A company ships computer components in boxes that contain 20 iteams. Assume the probability of a defective component is .4. use the geometric distribution to find the probability that the first defect is found in the third or fourth component test..
With standard deviation of 15. Test hypothesis that Mrs. Smith and Mrs. Jones are equally effective teachers. Use 0.10 level of significance.
Simulate 50 observations from a normal distribution with mean 0 and standard deviation 1. make a normal plot.
At.05 significance level, can we conclude that larger proportion of the agents think the economy is expanding this month?
A researcher studies the average distance that 130 people who are living in U.S. urban areas walk each week: What is the size of the sample? Identify the population.
Assuming a normal distribution, What is the z-score associated with the second quartile? If we wish to have 95% confidence interval, what would be the value of the confidence coefficient?
What is the probability that a cereal would both high calorie and high fiber? In other words, what is P(high calorie and high fiber)?
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