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If alpha=0.05 and p= 0.07 ,would we reject or fail to reject null hypothesis? Please explain.
Determine the probability the sample of 40 will have a sales average less than $400,000.
What is the research hypothesis? Should you conduct a one-or two tailed test? Why?
a light fixture contains 2 light bulbs. the lifetime xi of each bulb is exponentially distributed with a mean of 200
Find a 95% confidence interval for the mean of all drinks dispensed by this machine if a random sample of 36 drinks has an average content of 2.25 deciliters.
In the construction of confidence intervals, if all other quantities are unchanged, an increase in the sample size will lead to a ____________ interval.
It is estimated that 3% of the athletes competing in a large tournament are users of an illegal drug to enhance performance. The test for this drug is 90% accurate.
mens heights are normally distributed with mean 69.0 inches and standard deviation 2.8 inches. mimi is designing a
A standard deviation of 1 month will have a total lifetime of at least 45 months if all of the bulbs are used non stop.
The shoppers are grouped in three age categories, under 30, 30 up to 50 and 50 and over. The data is summarized in the table. Let A be the event that a randomly selected shopper is under 30. Find the probability of A.
What is the minimum score needed to be in the top 25% on this test? Carry your intermediate computations to at least four decimal places.
If the answer cannot be calculated, enter zero (0) as your answer. Round to 4 decimal places otherwise. YES, you need, therefore, to look at the 5th decimal place.
In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a m..
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