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You're given that the forecast for the current period of 70 turned out to be 6 units less than the actual demand. The forecast for the next period is 75.8. What must alpha equal (rounded to 4 decimals) if a simple exponential smoothing forecast method were being used?
A university found that 20 percent of its students withdraw without completing the introductory statistics. Assume that 20 students registered for the course.
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
At the .10 significance level you will test to determine if there has been an increase in selling time. Is this a 1 or 2 tail test?
Let's play a game. An urn contains five red, four green and one gold ball other than color, the balls are identical. You are blindfolded and allowed to pick a ball from the urn. Red pays $5, green pays $10 and gold pays $50.
a) What statistical test should be used to analyze these data? b) Identify H0 and Ha for this study. c) Conduct the appropriate analysis d) Should H0 be rejected? What should the researcher conclude?
Project was estimated by using ADM/PERT analysis. Due to extensive length of project many activities were combined; Following is the result.
A researcher is comparing two antihypertensive drugs A and B with regards to reduction of patient's systolic blood pressure (SBP). Baseline SBP is measured for two groups of patients.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. State the decision rule.
Thirty-two samples of 8 items each were collected from a process. The average sample mean is 12 and the average range is 0.10.
A fair die is rolled nine times. What is the probability that an odd number (1,3 or 5) will occur less than 3 times?
Assume that the amount your town's population grows every year is fixed or constant. Utilize your equation in part b to approximate the population in the year 2030.
A company auditor was interested in estimating the total number of travel vouchers that were incorrectly filed. In a SRS of size n =50 oft of the group of N = 250, were filed incorrectly.
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