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A common error is neglecting to get ranked data for some statistical processes. Why do we have to have ranked data? Give an example of where you would need ranked data.
(short paragraph answer, 100 words)
The probability is 90% that the sample percentage is contained within what symmetrical limits of the population percentage?
In a group of seven adult friends, what is the probability that: a) no one has done a one-time fling?
Given that x is a normal variable with mean u = 47 and standard deviation = 6.2, find:
The Bureau of Labor Statistics says that baggage handlers, trash haulers, and coal miners are among the occupations having the highest risk of the debilitating injury or illness. For coal miners working over the course of a year, 3.60 injuries per..
The number of widgets produced by 9 employees in an eight hour shift is recorded below. Find the mean number of widgets produced.
Detremine the mean, standard deviation, and variance for this frequency distribution.
The hypotheses tested by the one-way ANOVA F test - Evaluate the P-value of the ANOVA F test
Show that if in the Law of Large Numbers we omit the assumption that all the X have the same mean and replace the m in the conclusion by [E(X1)+...+E(Xn)]/n, the law remains valid.
Two balanced dice are rolled and the number of dots facing up is added. Find the probability that the sum is 10 or 12.
Prediction equation is y^ = 30 + 0:60x. Determine predicted final exam score for student who has (i) midterm score = 100, (ii) midterm score = 50. Note that predicted nal exam score regresses toward mean.
There is some concern that exposure to gases used in anesthesiology might be harming health of anesthesiologists. In one study of 525 Michigan nurse anesthesiologists, 10 reported a new malignancy other than skin cancer during the previous year.
(a) State the hypothesis for a right-tailed test. (b) Obtain a test statistic and p-value assuming equal variances. Interpret these results. (c) Is the difference in mean scores large enough to be important?
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