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Find the mean, median, and mode for the following sample of scores:2,3,3,1,2,5,2,3,4,2
Independent random samples taken on two university campuses revealed the following information concerning the average amount of money spent on textbooks during the fall semester.
How large should n be so that a 90% confidence interval for µ has a margin of error and What is the P-value for a test of the hypotheses
Each time that Ed charges his credit card, he omits the cents and records only the dollar value. If this month he has charged his credit card 20 times what can be said about the probability that the record shows at least $15 less than the actual a..
20% of teenagers in a small town say they like reading news online. Suppose you randomly select 7 teenagers from the town and ask them whether or not they enjoy reading news online. Find the probability that at least 3 say they enjoy reading news ..
Is there enough evidence to support the consumers conjecture at a=0.05. First, indentify the alternative and the null hypotheses.
Test hypothesis that Site B is more successful in initiating acquaintances than Site A. Use alpha = .05.
A processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test the weight ofthe boxes, a few were checked.
A producer of pleasure boats wants to maximize revenue during the next month. Two types of boats are sold, x1 and x2. Type x1 sells for $40,000 and type x2 sells for $30,000.
For a hypothesis test about a population proportion or mean, if the level of significance is less than the p-value, the null hypothesis is rejected.
What is the mean and standard deviation of the sampling distribution when we take all samples of size25?
This is a test regarding two dependent samples. There is sufficient evidence to conclude that the mean price of textbooks is lower at seller A.
Two or more are rated as outstanding. (b) None of the trainees are rated as unsatisfactory. (c) Two are rated outstanding, six are rated excellent/good, one is rated satisfactory.
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