Sheridan Motors is a car dealership that would like to investigate if there is a difference in the average number of car sales per month between three sales employees using a randomized block ANOVA.
The following data represent the number of car sales last year for these employees for six different months.Month Bill John ChrisFebruary 7 8 6April 10 12 8June 13 16 10August 10 16 10October 11 13 9December 9 10 11The sum of squares error for these observations is ________.A) 17.4
B) 18.1
C) 20.6
D) 23.0
Q. 2The following data represent the number of refrigerators sold for each of the past five months for Templeton Appliances.
Month Sales
1 25
2 20
3 40
4 35
5 30
Using a two-period simple moving average, the forecasting error for Month 3 is ________.
A) 2.5
B) -5.0
C) -7.5
D) 17.5
Q. 3The sign test can be used to determine if consumers prefer one product or service over another.
Indicate whether the statement is true or false
Q. 4The Beer Institute reported that monthly consumption of beer is 1.7 gallons per person.
A random sample of 36 adults was selected. Using a standard deviation of 0.5 gallons per month per person, what is the probability that the sample mean was between 1.6 and 1.8 gallons per month per person?
A) 0.4960
B) 0.5596
C) 0.7698
D) 0.9082
Q. 5Increasing the sample size when calculating a confidence interval while keeping the confidence level constant will
A) reduce the margin of error resulting in a wider (less precise) confidence interval.
B) increase the margin of error resulting in a narrower (more precise) confidence interval.
C) reduce the margin of error resulting in a narrower (more precise) confidence interval.
D) increase the margin of error resulting in a wider (more precise) confidence interval.
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