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Question The following information is available.
H0: μ ≤ 10H1: μ > 10
The sample mean is 12 for the sample of 36. The population standard deviation is 3. Use the .02 significance level.
a. Is this a one- or two-tailed test?
b. What is the decision rule?
c. What is the value of the test statistic?
d. What is your decision regarding H0?
e. What is the p-value? Interpret it.
Determine the percentage of defective washers produced by this machine, assuming the diameters are normally distributed.
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However, if they lose the first contract, the president thinks that the probability of winning the second contract decreases to 48%. What is the probability that they win both contracts?
If Chebychev Inequality gives the lower bound for probability. For the present problem the lower bound for the probability is 0.75 and actual probability is 0.87.
Four brands of lightbulbs are being considered for use in the final assembly area of the Saturn plant in Spring Hill, Tennessee. The director of purchasing asked for samples of 100 from each manufacturer.
Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern.
In the Arnold's Muffler example for the exponential distribution, the average rate of service was given as 3 per hour, and the times were ex-pressed in hours.
A student scores 81 on a chemistry test and 75 on a history test. For the chemistry test, the mean was 70 and the standard deviation was 20. For the history test, the mean was 65 and the standard deviation was 8.
the average on an exam is 75 and the standard deviation is 17. if the instructor assigned grades based on the normal
Find the probability that between 7 and 9 defective toys are produced in a lot. Find the probability that between 7 and 9 defective toys are produced.
Suppose we select a sample of 40 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 59,050 and 60,950?
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