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In a study of 24 criminals convicted of antitrust offenses, the average age was 55 years, with a standard deviation of 7.6 years. Construct a 98% confidence interval of the true mean age.
Use the t test to determine whether the slope of the regression model is significant at α = 0.05.
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
Computing the probability values using normal distribution - what proportion of licensed drivers are less than 30 years old?
You want to know whether the population means are different in the two populations. Conduct an hypothesis test using an alpha of .05 and the critical value method.
What proportion of the hearing loss in all the workers was attributable to not wearing earplugs?
A study of accounts receivable at the A&W Department Store indicates that bills are either current, one month overdue, two months overdue, written off as bad debts, or paid in full.
A person is considering purchasing the stock of two home health companies that are similar in all respects except the proportion of earnings paid out as dividends.
Support your contention with three examples from your experience at other organizations or departments. Where applicable, for each example, indicate what are the treatments and blocking variables.
Is there meaningful relationship between grades and SAT scores? If student scores 450 on the SAT, what do youbelieve his or her GPA will be?
In classical hypothesis testing, test statistic is to critical value what the?
How could your answer in question (a) change if you knew returns followed a skewed distribution instead of a normal distribution? Explain briefly.
Suppose that January sales for the fourth year turn out to be $295,000. What was your forecast error? If this is a large error, Karen might be puzzled about the difference between your forecast and actual sales value.
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