Week 1 Test A2

Question 1 0/ 1 point A market researcher polled every eighth person who walks into a grocery store. What type of sampling was used? Cluster Stratified Simple Random = Systematic Convenience Question 2 0/ 1 point "Number of times per week" is what type of data in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local gym in San Antonio, Texas. The first car in the parking lot was selected randomly, and then the resident of every eighth car in the lot around the gym was interviewed. Qualitative = Quantitative Discrete Quantitative Continuous Question 3 0/ 1 point A group of test subjects is divided into 10 groups; then 3 of the groups are chosen at random. What type of sampling is used? = Cluster Convenience Stratified Systematic Simple Random

Question 4 0/ 1 point What is the sampling method used in the following scenario? The barista at a local Starbucks wants to determine what proportion of the coffee users are teenagers. The barista has a tally sheet on which she marks whether the coffee order is for a teenager or adult. She records this data for every fifth patron who orders coffee. = systematic cluster convenience stratified simple random Question 5 0/ 1 point What was the sampling method that was used in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local gym in San Antonio, Texas. The first car in the parking lot was selected randomly, and then the resident of every eighth car in the lot around the gym was interviewed. simple random cluster systematic stratified Question 6 0/ 1 point A local Polling chapter is interested in the proportion of people who voted in the last election. Identify the statistic. = the proportion of the sample who voted in the last election all people (maybe in a certain geographic area, such as everyone in the state) a group of the people the proportion of all people who voted in the last election

Question 9 0/ 1 point Forbes magazine published data on the best small firms in 2012. These were firms which had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1 billion. The table below shows the ages of the chief executive officers for the first 73 ranked firms. Age [Frequency|Relative FrequencylCumulative Relative Frequency]| 40-44] 4 45-49 3 50-54) 15 55-59| 20 60-64) 21 65-69 8 70-74 2 Answer the following questions: What percentage of CEOs are 59 years or younger? Round your answer to the nearest tenth. What is the relative frequency of ages 65 to 69? Round your answer to 4 decimal places ________ % (0.1096,.1096) What is the cumulative frequency for CEOs over 55 years in age? Round to a whole number. Do not include any decimals.

Question 10 0/ 1 point Use the following information to answer the question: The (incomplete) table below contains data on hurricanes that have made direct hits on the U.S. Between 1851 and 2004. A hurricane is given a strength category rating based on the minimum wind speed generated by the storm. Frequency of Hurricane Direct Hits Category|Number of Direct Hits|Relative Frequencyi Cumulative Frequency| 1 115 0.3758 0.3758 2 107 0.7255 s | e B 4 B 15 0.0490 B 5 4 1.0000 Total=306 What is the relative frequency of direct hits that were category 3 hurricanes? Not enough information to calculate = 02124 0.0131 0.0490

Question 14 0/ 1 point Round the fraction to 4 decimal places. Make sure you include the O in front of the decimal. Answer: % (0.4286) Question 15 0/ 1 point Education and graduation rate statistics for 50 US states were collected from local high schools . One analysis of this data found a strong connection between education and income indicating that higher levels of education in a community correspond to lower income. Which of the potential problems with samples discussed below could explain this connection? Non-response or refusal of subject to participate Self-funded or self-interest study Misleading use of data = Confounding Question 16 0/ 1 point What measurement scale is used in the following example? Number of children a person has. Ordinal Interval Nominal = Ratio

Question 17 0/ 1 point What measurement scale is used in the following example? Public Pool temperatures in the Summer months: 60, 65, 70, 75, 80, 85 Ordinal Nominal = Interval Ratio Question 18 0/ 1 point What measurement scale is used in the following example? Time of day: morning, afternoon, evening, night Interval Ratio Nominal = Ordinal Question 19 0/ 1 point What measurement scale is used in the following example? College Football players classified by their athletic ability: Superior, Average, Above average: Interval Nominal = Ordinal Ratio Question 20 0/ 1 point What measurement scale is used in the following example? A satisfaction survey of a local restaurant: 1=Very Satisfied 2= Satisfied 3= Somewhat Satisfied 4=Not Satisfied = Ordinal Interval Ratio Nominal