CHAPTER 2 QMB 3200 UCF PRACTICE QUESTIONS AND ANSWERS 2024

A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and their plan of going to graduate school. According to the crosstabulation above, what percent of undergraduate majors plan to go to graduate school? 65.0% 19.3% 27.8% 35.0% 35.0% The scatter diagram below displays the amount of money (in millions) spent on advertising and the amount of sales (in millions) for 8 years. Which of the following statements is correct? There is a positive relationship between sales and advertising, which means that as more money is spent on advertising, the sales increase. There is a negative relationship between sales and advertising, which means that as more money is spent on advertising, the sales increase. There is a negative relationship between sales and advertising, which means that as more money is spent on advertising, the sales decrease. There is a positive relationship between sales and advertising, which means that as more money is spent on advertising, the sales decrease. There is a positive relationship between sales and advertising, which means that as more money is spent on advertising, the sales increase. Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should: construct a dot plot and look for significant gaps. investigate whether any hidden variables could affect the conclusions. construct a scatter diagram and find the trendline. develop a relative frequency distribution. investigate whether any hidden variables could affect the conclusions. The difference between the lower class limits of adjacent classes provides the: class width. number of classes. class limits. class midpoint. class width. In a crosstabulation: both variables can be either categorical or quantitative. both variables must be categorical. both variables must be quantitative. one variable must be categorical and the other must be quantitative. both variables can be either categorical or quantitative. The following data shows the price of PAO, Inc. stock over the last 8 months. Which type of graph would be appropriate for displaying this information? Scatter diagram Histogram Side-by-side bar chart Stacked bar chart The distribution of exam scores is skewed to the left. The relative frequency of a class is computed by: dividing the frequency of the class by the sample size. dividing the midpoint of the class by the sample size. dividing the frequency of the class by the midpoint. dividing the sample size by the frequency of the class. dividing the frequency of the class by the sample size. The test scores of 14 individuals on their first statistics examination are shown below. A score of 60 or better indicates that the student passed the exam. Which of the following statements is correct? The distribution of exam scores is skewed to the left. The stem-and-leaf display shows us that the females in the class scored higher than the males. All of the students earned passing scores on the exam. It would not be appropriate to display this data in a histogram. The distribution of exam scores is skewed to the left. A dot plot of the ages of 10 employees of a company is shown below. Ages are rounded to the tens place prior to constructing the graph. What is the shape of the distribution? Explain. The distribution of employee ages is skewed to the right because the tail of the distribution extends further toward higher numbers. The distribution of employee ages is skewed to the left because the most common age is 20, which is on the left side of the graph. The distribution of employee ages is skewed to the left because the tail of the distribution extends further toward higher numbers. The distribution of employee ages is skewed to the right because the most common age is 20, which is on the left side of the graph. The distribution of employee ages is skewed to the right because the tail of the distribution extends further toward higher numbers. The stacked bar graph below shows the responses of 60 Grade 8 boys and 40 Grade 8 girls, when asked the question, "Which of the following three sports do you like the best: basketball, badminton, or volleyball?" The boys' responses are displayed above the girls' responses in each bar. What percent of the boys prefer volleyball? 75% 20% 33.3% 66.6% 33.3%