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1. You are interested in testing whether a particular brand of floppy disks has more than 5% defectives. A random sample of n = 325 disks contains 18 defectives.
(a) State the null and the alternative hypotheses.
(b) Conduct the test by computing a p-value.
2. The time between telephone calls at a company switchboard has an exponential distribution with mean of 3 minutes.
(a) Find the probability that the average of 45 of these times is less than 2.5 minutes.
(b) Find the 0.15 quantile for the average of 45 of these times.
Repeat Exercise 19 for the group of men who were given the fish oil diet and then answer these questions: Is there any evidence that the mean reduction for this group is different from zero? What is the typical reduction in blood pressure expected..
the claim is that the proportion of peas with yellow pods is equal to 0.25 or 25. the sample statistics from one
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
audits. between quarterly audits a company checks its accounting procedures to detect problems before they become
the average age of amtrak passenger train cars is 19.4 years. if the distribution of ages is normal and 24 of the cars
Estimate using three day weighted moving average. Estimate sales for the next day using a three-day weighted moving average where the weights
Using a MANOVA, try to ascertain which version of the drug (A, B or C) shows the most promise. Perform the following analyses, and paste the SPSS output into your document.1. Exploratory Data Analysis.
Given the Life expectancy data for the countries of the E.U., can we conclude that the mean Life Expectancy in the U.S. is greater than the mean Life expectancy in the E.U.?
The ability to pay attention and the level of stimulation in the environment. how would a researcher work around this issue?
Suppose that past data are not available for developing a planning value for p; therefore, you will use p = 0.050 for the planning average.
A IRS auditor randomly selects 3 tax returns from 48 returns of which 9 contain errors. What is the probability that she selects none of those containing errors? Round to four decimal places.
Give the Z score for person who scores (a) 340, (b) 310, and (c) 260. Give the raw scores for persons whose Z score on this test are (d) 2.4, (e) 1.5, (f) o, and (g) -4.5
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