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A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with one of the booklets, then given a test a week later. For the 13 using the standard version, the average exam score was 72.0, with a standard deviation of 9.3. For the 13 given the new version, the average score was 80.2, with a standard deviation of 10.1. Assuming normal populations with equal standard deviations, and using the 0.05 level of significance, does the new booklet appear to be better than the standard version?
a pair of fair dice is thrown. find the probability p that the sum is 10 or greater if label event and sample spacea a
Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.
Assume that the person holding the hand is asked to "Name an ace in your hand" and answers "The ace of hearts." What is the probability that he has a second ace?
Work through a simple regression calculation using intrinsic job satisfaction nd extrinsic job satisfaction. Select thirty data points to use for each group.
Find 99% confidence interval for estimating their mean height and find 95% confidence interval for estimating the mean height.
Develop a pie chart depicting the breakdown of adjusted gross income. Write a paragraph summarizing the information.
Let X be the number of individuals in a simple random sample of size 50 from this population who get some relief by taking ibuprofen, and let pˆ be the sample proportion. Find the probability that the value of p is in the interval
question 1 explain the continuity correction factor and provide a good example. 3-4 paragraphsquestion 2 randomly
calculate the mean and variance for each portfolio's returns
Give an example of a polynomial of a degree 2 that satisfies the following two conditions: (1) the coefficient of x^2 is 1 and (2) the polynomial cannot be factored. Explain why the polynomial cannot be factored.
Now suppose 3 of his customers want the same ring, and they will go to another store if its already been sold. Would it be appropriate to use the binomial distribution under these conditions? Why or why not?
Find the probability of being a jackpot winner. You must show all work to show how you and your partner got the answer. There is more than one way to do this problem.
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