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A manufacturing company wishes to compare two production facilities based on Defective units out of total unit production. The company obtains random samples from both facilities. Facility A produced a total of 983 units, 115 of which were defective. Facility B produced 104 defective units out of a total of 1085 units. At the 5% significance, does facility A produce higher a number of defective units out of its total production than facility B?
What is the alternative hypotheses and p-value?
A gambler believes that a strategy called "doubling up" is an effective way to gamble. The method requires the gambler to double the stake after each loss. Thus, if the initial bet is $1, after losing he will double the bet until he wins. After a ..
A box contains 5 tickets. An unknown number of them are red, the rest are green. Suppose that to start off with you think there are equality likely.
A standard measure of aggression in 7-year-old children has been found to have a 20% trimmed mean of 4.8 based on years of experience.
Test to determine if there is a significant negative relationship between the independent and dependent variable at alpha=.05 and .01.
A college office has one photocopier. Faculty and staff arrive according to a Poisson process at a rate of 5 per hour. Copying times average 8 minutes according to an exponential distribution. What are the operating characteristics for this system..
Suppose you obtained the heights of ten women and calculated a confidence interval from this information. Without knowing the population mean µ.
construct a contingency table for the relationship between degree of anger and the incidence of heart disease.- Among those with no anger symptoms, what percentage had coronary heart disease?
Researchers testing a new medication find that 7% of users have side effects. To how many pa- tients would a doctor expect to prescribe the medication before finding the first one who has side effects?
A random sample of 51 observations was selected from a normally distributed population. The sample mean was x = 88.6 , and the sample variance was s2 = 38.2.
Calculate the value of the test statistic W.
The shape of the population is unknown. Determine the probability of each of the following occurring from this population.
Using the data of Table 8.8 carry out a principal components analysis of the object correlation matrix using (a) Spearman's rho and (b) Kendall's tau correlation coefficients What do you conclude?
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