Straighterline Business Statistics Quiz 1 Latest Version Graded A+

Straighterline Business Statistics Quiz 1 Latest Version Graded A+ According to Chebyshev's Theorem, 75% percent of the observations lie within plus and minus 2.00 average mean deviations. False The order that runners finish in a race would be an example of continuous data. False For an ordered data set with an even number of ungrouped values, half of the values will be less than the median. True What level of measurement is the price of an admission ticket to a movie theater? Ratio If a variable is measured at the interval or ratio level, all the values are included when computing the mean. True What is the relationship among the mean, median and mode in a symmetric distribution? They are all equal For any data set, which measures of central location have only one value? Mean and median For any data set, Chebyshev's Theorem estimates the proportion of observations that occurs within k standard deviations of the mean, where k is greater than 1.0. True A listing of 100 family annual incomes is an example of statistics. False A store asks shoppers for their zip code to identify market areas. Zip codes are an example of ratio data. False In a company, the standard deviation of the ages of female employees is six years and the standard deviation of the ages of male employees is ten years. These statistics indicate that the dispersion of age is greater for females than for males. False The final rankings of the top 20 NCAA college basketball teams are an example of which level of measurement? Ordinal A marketing research agency was hired to test a new DVD player. Consumers rated it outstanding, very good, fair or poor. The level of measurement for this experiment is ordinal. True The weights of a sample of crates ready for shipment to Moscow, Russia are (in kilograms): 103, 97, 101, 106 and 103. What is the mean deviation? 2.4 kg MD = (∑|X-X ̅|)/n According to the Empirical Rule, the middle 95 percent of the wires tested between approximately what two values? "About 95% of the observations will lie within +/- 2 standard deviations of the mean" Based on a sample of 3,000 people, the civilian unemployment rate in the United States was 5.5%. 5.5% is referred to as a statistic. True In a negatively skewed distribution, the mean is smaller than the median or mode and the mode occurs at the peak of the curve. True When TV advertisements report "2 out of 3 dentists surveyed indicated they would recommend Brand X toothpaste to their patients," an informed consumer may question the conclusion because: The advertisement does not include the total number of dentists surveyed. A population is a collection of all individuals, objects, or measurements of interest. True The number of work stoppages in a highly industrialized region for selected months are: 6, 0, 10, 14, 8 and 0. What is the median number of stoppages? 7 The general process of gathering, organizing, summarizing, analyzing, and interpreting data is called Statistics Which of the following is an example of a continuous variable? Family Income What is the median of 26, 30, 24, 32, 32, 31, 27 and 29? 29.5 What is a disadvantage of the range as a measure of dispersion? Based on only two observations The performance of personal and business investments is measured as a percentage, "return on investment". What type of variable