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Some IQ tests are standardized to normal model with mean of 100 and the standard deviation of 16.
a. Draw a model for these IQ scores, clearly label it , showing what the 65-95-99.7 rule predicts about the score.
b. In what interval would you expect the central 95% of IQ scores be found
c. About what percent of people should have IQ scores above 116?
d. About what percent of people should have IQ scores between 68 and 84?
e. About what percent of people should have IQ scores abouve 132?
Based on the result, does there to be an overall perception of 1 minute that is reasonably accurate?
Given this, compute the following probabilities for demand during lead time(DDLT).
What factors might cause the company to order a larger or smaller amount than the EOQ?
calculate the mean or expected value for the number of retransmissions and calculate the standard deviation for the number of retransmissions.
Find the power of the test designed to determine if the the new safety equipment is effective when the mean percent reduction is actually 2.3%. Assume that the population standard deviation is 12% and that α is 0.02. What is the power?
Construct a 99% confidence interval for the difference between the true average boot times of the two types of hard drives. Assume the difference will represent (HDD-SSD) and that the population standard deviations are statistically the same.
Given that consumer changed te brands, what is the probability that consumer purchased fewer products than before?
Where S, A, and R are measured in dollars per week. Vanguard's marketing director is comfortable using parameter estimates that are statistically significant at the 10% level or better.
Interpret the interaction graph in terms of what it shows about the three effects tested.
What maximum variance of the raw score population could you have and still be able to reject the null hypothesis of μ = 20 (α = .05), if the sample size is 100 and the sample mean is 22?
Suppose that you're the Quality Manager for the Emerson D. Meritz Machine Tool Company. Your model IE566 grinding machine is afflicted by three types of defects classified as major (type A), serious (type B) and minor (type C).
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
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