StraighterLine Business Statistics MAT150 WITH 100% correct answers.docx, Exams of Biology

Download StraighterLine Business Statistics MAT150 WITH 100% correct answers.docx and more Exams Biology in PDF only on Docsity! StraighterLine Business Statistics MAT150 WITH 100% correct answers A marketing class of 50 students evaluated the instructor using the following scale: superior, good, average, poor, and inferior. The descriptive summary showed the following survey results: 2% superior, 8% good, 45% average, 45% poor, and 0% inferior. - answer Most students rated the instructor as poor or average. Which word is NOT part of the definition of descriptive statistics? - answer Predicting In a sample of 900 people in a city, 225 are smokers. Based on this information, the magazine reported that "25% of all people in the city are smokers." This report is an example of _______: - answer Inferential Statistics Respondents were asked, "Do you now earn more than or less than you did five years ago?" What is this level of measurement? - answer Ordinal Which of the following is an example of a continuous variable? - answer Tons of concrete to complete a parking garage If Gallup, Harris, and other pollsters asked people to indicate their political party affiliation as Democrat, Republican, or Independent, the data gathered would be an example of which scale of measurement? - answer Nominal The names of the positions in a corporation, such as chief operating officer or controller, are examples of what type of variable? - answer Qualitative The incomes of 50 loan applicants are obtained. Which level of measurement is income? - answer Ratio The following are the weekly amounts of welfare payments made by the federal government to a sample of six families: $139, $136, $130, $136, $147, and $136. What is the range? - answer $17 What is the relationship between the variance and the standard deviation? - answer Variance is the square of the standard deviation. The distribution of a sample of the outside diameters of PVC pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. About 68% of the outside diameters lie between what two amounts? - answer 13.9 and 14.1 inches According to Chebyshev's Theorem, at least what percent of the observations lie within plus and minus 1.75 standard deviations of the mean? - answer 67% For a sample of similar sized all-electric homes, the March electric bills were (to the nearest dollar): $212, $191, $176, $129, $106, $92, $108, $109, $103, $121, $175, and $194. What is the range? - answer $120 If the variance of the "number of daily parking tickets issued is 100, the standard deviation is defined as the _____________. - answer Square root of the variance of the "number of daily parking tickets"