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If random samples, each with n = 4 scores, are selected from a normal population with MK = 80 and o=10, then the distribution of sample means will have a standard error of __________ .
A. 2.5 B. 5 C. 10 D. 80
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
Findout the 98% confidence interval for true mean. Findout a 98% confidence interval for the cigarette tax in all 50 states.
At the .05 significance level, can we conclude that the guideline is still reasonable?
The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Assume 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71.
Write the null and alternative hypotheses you would use to test the following situation.
In testing the difference between two means from two independent populations, the sample sizes do not have to be equal to be able to use the Z statistic.
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
how many individuals will I need to sample if I want a 95% margin of error to be no more than 3%, I want to know if the results are significant at = 10%. With the information given.
Note that Σ x = 2233 and Σ x 2 = 138,053. At the 5% level of significance, can the instructor conclude that the new mean is different from 64?
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
Suppose you were to cut up the directory and pull out one listing at random to contact.
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