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In a large section of a statistics class, the points for the final exam are normally distributed with a mean of 72 and a standard deviation of 9. Grades are to be assignedd according to the following rule:
The top 10% receive AsThe next 20% recive BsThe middle 40% receive CsThe next 20% receive DsThe bottom 10% recieve Fs
Find the lowest score on the final exam that would qualify a student for an A, a B and a C
Compute the z score for the data company. Considering the altman model, comment on the likelihood that this firm will experience financial failures.
The standard deviation is estimated to be 0.279. Use the 99% level of confidence.
An automobile assembly line operation has a scheduled mean completion time of 2.2 minutes. Because of the effect of completion time on both preceding and subsequent assembly operations, it is important to maintain the 2.2 minute mean completion ti..
A survey is planned to determine the mean annual family medical expenses of employees of a large company. The management of the company wishes to be 95% confident that the sample mean is correct to within plus-or-minus $50 of the population mean.
10 cobalts are ramdomly selected and the miles per gallon for each car are recorded. What is the probability that the mean miles per gallon exceeds 34 miles per gallon?
The Bureau of Labor Statistics reported that the average annual income of dentists in the year 2005 was $110,000. A sample of 81 dentists, which was taken in 2006,
Calculate the Coefficient of Skewness and the Coefficient of Variation for time spent working on QM.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
A process follows the binomial distribution with n = 8 and p = .3. Find
Using Area of Residence (Area A or Area B) as my stratification factor, explain, in detail, how you would select a sample of 60 inhabitants by using stratified random sampling.
The statewide incidence of gonorrhea is 50 per 100,000 over a 3 month period. Is the number of gonorrhea cases in this county unusual for this time period?
Afterward, each mouse is given a hyperactivity rating score. The mean score was x_bar = 14.9 and s = 2.8. Give a 95% confidence interval for the population mean score μ.
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