# Quizzes - Quiz 1 1(Points 4.0 What type of variable is the...

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Quiz 1 1. (Points: 4.0) What type of variable is the number of gallons of gasoline pumped by a filling station during a day? Continuous 2. (Points: 4.0) If Gallup, Harris and other pollsters asked people to indicate their political party affiliation - Democrat, Republican or Independent, the data gathered would be an example of which scale of measurement? Nominal 3. (Points: 4.0) The main purpose of descriptive statistics is to: Summarize date in a useful and informative matter. 4. (Points: 4.0) The incomes of a group of 50 loan applicants are obtained. Which level of measurement is income? Ratio 5. (Points: 4.0) A bank asks customers to evaluate the drive-thru service as good, average, or poor. Which level of measurement is this classification? Ordinal Quiz 2 1. Refer to the following information from a frequency distribution for heights of college women recorded to the nearest inch: The first two class midpoints are 62.5" and 65.5". 67 and up to 70 2. What is the relative frequency of those salespersons that earn more than \$1,599? 30.8% 3. What is the class interval? 200 4. Refer to the following information from a frequency distribution for heights of college women recorded to the nearest inch: The first two class midpoints are 62.5" and 65.5". What are the class limits for the lowest class? 61-64

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5. Refer to the following distribution: What is the relative class frequency for the \$25 up to \$35 class? 4% Quiz 4 1. What is the value of the Pearson coefficient of skewness for a distribution with a mean of 17, median of 12 and standard deviation of 6? +2.5 2. A study of business faculty at state supported institutions in Ohio revealed that the arithmetic mean salary for nine months is \$52,000 and a standard deviation of \$3,000. The study also showed that the faculty had been employed an average (arithmetic mean) of 15 years with a standard deviation of 4 years. How does the relative dispersion in the distribution of salaries compare with that of the lengths of service? Salaries about 6%, service about 27% 3. What statistics are needed to draw a box plot? Minimum, maximum, median, 1 st and 3 rd quartile 4. A research analyst wants to compare the dispersion in the price-to-earnings ratios for a group of common stocks with their return on investment (ROI). For the price-to-earnings ratios, the mean is 10.9 and the standard deviation is 1.8. The mean return on investment is 25 percent and the standard deviation 5.2 percent. What is the relative dispersion for the price-to-earnings ratios and return on investment? Price-to-earnings =16.5 percent, ROI = 20.8 percent 5. A study of the scores on an in-plant course in management principles and the years of service of the employees enrolled in the course resulted in these statistics: Test 20%, Service 10% Quiz 5 1. A study of 200 computer service firms revealed these incomes after taxes: .49 2. The numbers 0 through 9 are to be used in code groups of four to identify an item of clothing. 5040 3. What does equal? 10 4. A survey of top executives revealed that 35% of them regularly read Time magazine, 20% : .65 5. A board of directors consists of eight men and four women. A four-member search committee is to be chosen at random to recommend a new company president. What is
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