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Question: Placement exams. An incoming freshman took her college's placement exams in French and mathematics. In French, she scored 82 and in math 86. The overall results on the French exam had a mean of 72 and a standard deviation of 8, while the mean math score was 68, with a standard deviation of 12. On which exam did she do better compared with the other freshmen?
Explain the difference in interpretation between an observation falling below the lower control limit on an X‾ -chart and one falling below the lower control limit on an R-chart. Discuss the impact of each on the revision of control charts in the ..
Calculate the correlation coefficient of the typing speed of administrative assistants using ergonomic and standard keyboards.
a sample was drawn of one-acre plots of land planted with corn. the crop yields were recorded. calculate the
If the campaign manager's claim is correct, what is the probability that the sample proportion would be no more than 0.49 for a sample of this size?
The design of Example 10.3 determined a lead network in order to obtain desirable dominant root locations using a cascade compensator Gc(s) in the system configuration shown in Figure 10.1 (a).
A university recently completed a study to determine whether the number of classes students dropped during their college course work was related.
Use regression analysis to set up and solve whether or not college experience really determines someone's salary in the work place.
What is the probability that at least one of the shifts will be unrepresented in the sample of workers?
Use a significance level .05 to conduct a 4 step procedure. Be sure to state your conclusion. Formulate null and alternative hypothesis, test statistic and p value.
The random sample of 20 ball bearings diameters X1 , X2 ,... , X20 , pos- tulated in Example 13.4 as being from a Gaussian distribution with μ = 10, resulted in an average measured diameter of x¯ = 9.86 mm, and a standard deviation s = 1.01 mm.
1. If a new municipal bond is to be issued by a city, what is the probability that it will receive an A rating? 2. What proportion of municipal bonds are issued by cities? 3. What proportion of municipal bonds are issued by suburbs?
Microsoft Excel was used on a set of data involving the number of parasites found on 46 Monarch butterflies captured in Pismo Beach State Park.
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