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A random sample of 40 new cars was taken with a mean dealer sticker price of $24,310. Assuming that the population standard deviation is σ = $7,200, find the confidence interval for the mean price, μ, of all dealer sticker prices of new cars: for a confidence level of 90% in thousands of dollars:
(22.44, 26.18)
(22.08, 26.54)
(20.16, 28.62)
For following scores determine values of each expression: X: 4, 2, 1, & 5. åX, åX 2 , (åX) 2 , å(X-1).
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
In 1965, a newspaper carried a story about a high school student who reported getting 9207 heads and 8743 tails in 17,950 coin tosses. Is this a significant discrepancy from the null hypothesis H 0 = 1/2.
If we were to ask three people at arbitrary, determine the probability that they will all prefer punk rock?
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
Which combination of factors produces smallest risk of Type I error?
Give all steps of a test of the hypothesis that the corresponding population proportions are equal.
Determine the probability of fatal accident over lifetime? Describe your reasoning carefully. Suppose independent events. Why might the supposition of independence be violated?
Solve different inventory control problems using an appropriate OR method.
When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?
In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.
Using the Binomial Distribution, find the probability that if Air Northeast books 22 people on a flight, not enough seats will be available for all booked passengers.
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