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1. In an experiment comparing a new long-distance golf ball with the conventional design, each of 20 golfers hits one drive with each ball. The average golfer in the sample hit the new ball 9.3 yards farther, with a standard deviation of 10.5 yards. At the 0.005 level, evaluate the effectiveness of the new ball in increasing distance. Using the appropriate statistical table, what is the approximate p-value for this test?
2. The idling speed of 14 gasoline-powered genera- tors is measured with and without an oil additive that is designed to lower friction. With the additive installed, the mean change in speed was 123 revolutions per minute (rpm), with a standard deviation of 3.5 rpm. At the 0.05 level of significance, is the additive effective in increasing engine rpm?
What is the linear programming model for this problem?
please describe solution in detail especially the assumptions that must be made ie. what the standard deviation isthere
With a Rejection Region of 8, 9 or 10, what is the probability of a Type II error, if the job applicant has a probability of identifying the odd sample with p = 0.5?
a factory produces computer chips and the proportion of defective chips is 0.01 i.e. p0.01.suppose you take a sample
classified ads in a newspaper offered 15 used cars of the same make and model for sale. a regression analysis was
q1. consider the following time series.t 1 2 3 4 5 6 7yt 120 110 100 96 94 92 88a. construct a time series plot. what
Choose a variable and collect data for a least three different groups(samples). Compare the means of the three groups using the one-way ANOVA technique. Complete the following:
the probability of a successful missile launch is 0.9. test launches are conducted until 3 successful launches are
1. What is the current status of the housing stock in the county?
it is estimated that 20 of the athletes competing in a large tournament are users of an illegal drug to enhance
Suppose 100 randomly selected customers were asked to rate a particular service they recently had on a scale of 0 to 10. The sample mean rating was found to be 7.3.
In general one woman in ten will develop breast cancer. Research has shown that 1 woman in 650 carries a mutation of BRCA gene. Nine out of 10 women with this mutation develop breast cancer.
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