1. The stem in a stem and leaf display is the leading digit. *State whether the following statement is TRUE or FALSE.

2. If a data set is approximately normally distributed, its normal probability plot would be S-shaped. *State whether the following statement is TRUE or FALSE.

3.

Which of the following statistics is not a measure of central tendency? 0 Median O Arithmetic mean 0 Mode To monitor campus security, the campus police office is taking a survey of the number of students in a parking lot each 30 minutes of a 24hour period with the goal of determining when patrols of the lot would serve the most students. If X is the number of students in the lot each period of time. then X is an example of * O a categorical variable 0 a statistic O a discrete variable 0 a continuous variable Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals. such as textbook costs, are rarely considered. A researcher at Drummand University wishes to estimate the textbook costs of rstyear students at Drum mand. To do so. she monitored the textbook cost of 250 firstyear students and found that their average textbook cost was $600 per semester. Identify the population of interest to the researcher. * 0 All Drummand University students 0 All college students 0 All firstyear Drummand University students 0 The 250 students that were monitored A survey was conducted to determine how people rated the quality of programming available on television. Respondents were asked to rate the overall quality from 0 {no quality at all) to 100 (extremer good quality). The stemand Ieaf display of the data is shown below. What percentage of the respondents rated overall television quality with a rating of 50 or below? * Stem Leaves 3 2, 4 4 {1.3.4,1'1 B,9.9.9 5 {1,1, 1,2. 3,4,5 6 1, 2, 5, 6. 6 T D, 1 8 9 2 An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to ask them whether 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 result was obtained. If a customer is randomly selected, what is the probability that a randomly selected student did well on the midterm or went bar hopping the weekend before the midterm?* Did well on midterm Did poorly on midterm Studying for exam 80 20 Went bar hopping 30 70 O (90 + 100 - 20) / 200 or 0.85 (90 + 100 - 70) / 200 or 0.60 (110 + 100 - 30) / 200 or 0.90 (110 + 100 - 80) / 200 or 0.65An alcohol awareness task force at a BigTen university sampled 200 students after the midterm to ask them whether 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 result was obtained. If a customer is randomly selected, what is the probability that a randomly selected student did poorly on the midterm and also studying for exam before the midterm? * Did well on midterm Did poorly on midterm ' Studying for exam 56 20 l Went bar hopping 30 T0 0 70mm) or0.35 0 20mm) or0.10 O ammo or0.40 O 30 200 or 0.15 Health care issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid. The ages of 25 senior citizens were as follows. Determine the interguartile range of the ages of the senior citizens. * ED 65 70 76 86 S1 66 ?3 T6 87 B2 68 1'3 31 89 S3 63 1'4 81 90 B4 69 75 32 92 The Dean of Students mailed a survey to a total of 400 students. The sample included 100 students randomly selected from each of the freshman. sophomore. junior, and senior classes on campus last term. What sampling method was used? * O Stratified sample 0 Systematic sample 0 Simplerandomsample O Cluster sample