## A newspaper poll asked 2,150 adults in a country

1) A newspaper poll asked 2,150 adults in a country a series of questions to find out their view onthe country’s economy.The possible responses to the question "How many more months do you think the country’seconomy will require to get out of a recession?" are values from which of the following?A.continuous numerical variableB.discrete numerical variableC.table of random numbersD.categorical variable2)The manager of the customer service division of a major consumer electronics company isinterested in determining whether the customers who have purchased a media player made bythe company over the past 12 months are satisfied with their products.The possible responses to the question "How many media players made by other manufacturershave you used?" result in which of the following?A.a ratio scale variableB.an interval scale variableC.an ordinal scale variableD.a nominal scale variable3)A newspaper poll asked 2,150 adults in a country a series of questions to find out their view ontheir country’s economy.The population of interest is which of the following?A.All the males living in the country when the poll was taken.B.All the females living in the country when the poll was taken.C.All the people living in the country when the poll was taken.D.All the adults living in the country when the poll was taken.4) Most analysts focus on the cost of tuition as the way to measure the cost of a collegeeducation. But incidentals, such as textbook costs, are rarely considered. A researcher atDrummand University wishes to estimate the textbook costs of first-year students at Drummand.To do so, she monitored the textbook cost of 250first-year students and found that their averagetextbook cost was $600 per semester. Identify the sample in the study.A.All college students.B.All first-year Drummand University students.C.The 250 students that were monitored.D.All Drummand University students.5) Complete the sentence.A sample of 300 subscribers to a particular magazine is selected from a population frameof 9,000 subscribers. If, upon examining the data, it is determined that no subscriber had beenselected in the sample more than once, _______.A.the sample could not have been randomB.the sample may have been selected without replacement or with replacementC.the sample had to have been selected without replacementD.the sample had to have been selected with replacement6) Determine whether the following statements are true or false.The professor of a business statistics class wanted to find out the mean amount of time per weekher students spent studying for the class. She divided the students into the left, right and centergroups according to the location they sat in the class that day. One of these 3 groups wasrandomly selected and everyone in the group was asked the mean amount of time perweek he/she spent studying for the class. This is an example of a cluster sample.TrueFalse7) A sample of 200 students at a large university was taken after the midterm to ask themwhether they went bar hopping the weekend before the midterm or spent the weekend studying,and whether they did well or poorly on the midterm. The following table contains the result.Did Well on Midterm Did Poorly on MidtermStudying for Exam 8020Went Bar Hopping 3070If the sample is a good representation of the population, we can expect ________ percent ofthose who did poorly on the midterm to have spent the weekend studying.A.45B.10C.50D.22.228) Which of the following should be created when studying the simultaneous responses of twocategorical questions?A.A contingency tableB.A cumulative percentage distribution tableC.A histogramD.A frequency distribution table9)The following data are the duration in minutes of a sample of long-distance phone calls made within a country reportedone long-distance carrier. What is the width of each class?Relative Time (in Minutes)Frequency0 but less than 50.375 but less than 100.2210 but less than 150.1515 but less than 200.1020 but less than 250.07A.1 minuteB.100%C.2%D.5 minutes10) Determine whether the statement is true or false.The sum of relative frequencies in a distribution always equals 1.TrueFalse11) Determine whether the statement is true or false.When constructing a frequency distribution, classes should be selected so that they are of equalwidth.TrueFalse12) Determine whether the statement is true or false.To determine the width of class interval, divide the number of class groups by the range of thedata.TrueFalse13) A survey of 150 executives were asked what they think is the most common mistakecandidates make during job interviews. Six different mistakes were given. Which of the followingis the best for presenting the information?A.A stem-and-leaf displayB.A contingency tableC.A histogramD.A bar chart14) Determine whether the following statements are true or false.A computer company collected information on the age of their customers. The youngest customerwas 12 and the oldest was 72. To study the distribution of the age among its customers, it is bestto use a pie chart.TrueFalse15) Determine whether the statement is true or false.The stem-and-leaf display is often superior to the frequency distribution in that it maintains theoriginal values for further analysis.TrueFalse16) When constructing charts, which of the following is plotted at the class midpoints?A.percentage polygonsB.frequency histogramsC.cumulative percentage polygon (ogives)D.All of the above17) Determine whether the statement is true or false.A histogram can have gaps between the bars, whereas bar charts cannot have gaps.TrueFalse18) Determine whether the statement is true or false.A percentage polygon is formed by having the lower boundary of each class represent the data inthat class and then connecting the sequence of lower boundaries at their respective classpercentages.TrueFalse19) Data was collected on the monthly seasonally adjusted civilian unemployment rate for acountry over a 10-year period. Which of the following is the best for presenting the data?A.A stem-and-leaf displayB.A time-series plotC.A contingency tableD.A side-by-side bar chart20) Which of the following statistics is not a measure of central tendency?A.ModeB.Arithmetic meanC.Q3D.Median21) Determine whether the statement is true or false.The coefficient of variation is expressed as a percentage.TrueFalse22) Determine whether the statement is true or false.If a set of data is perfectly symmetrical, the arithmetic mean must be identical to the median.TrueFalse23) Determine whether the statement is true or false.If a set of data is perfectly symmetrical, the arithmetic mean must be identical to the median.TrueFalse24)Determine whether the statement is true or false.The median of the values 3.4, 4.7, 1.9, 7.6, and 6.5 is 4.05.TrueFalse25) Determine whether the statement is true or false.As a general rule, a value is considered an extreme value if its Z score is greater than 3.TrueFalse26) Determine whether the following statement is true or false.As a general rule, a value is considered an extreme value if its Z score is less thanminus?3.TrueFalse