Week 1 Homework: Data Types & Sampling Method Practices

Week 1 Knowledge Check Homework Practice Quest… Attempt 2 of 4 Written Jan 4, 2024 9:16 PM - Jan 4, 2024 9:42 PM Attempt Score 17.33 / 20 - 86.67 % Overall Grade (Highest Attempt) 19.67 / 20 - 98.33 % Question 1 1 / 1 point What kind of data is "the colors of the houses around the park" 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 park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed. Question 2 1 / 1 point What is the sampling method used in the following scenario? A woman in the airport is handing out questionnaires to travelers asking them to evaluate the airport's service. She does not ask travelers who are hurrying through the airport with their hands full of luggage but instead asks all travelers who are sitting near gates and not taking naps while they wait. Quantitative Discrete Quantitative Continuous Qualitative

Question 3 1 / 1 point The first 50 people who walk into a sporting event are polled on their television preferences. What type of sampling was used? Question 4 1 / 1 point What is the sampling method used in the following scenario? The marketing manager for an electronics chain store wants information about the ages of its customers. Over the next two weeks, at each store location, 100 randomly selected customers are given questionnaires to fill out asking for information about age, as well as about other variables of interest. Question 5 1 / 1 point convenience systematic stratified cluster simple random Convenience Systematic Stratified Cluster systematic simple random convenience cluster stratified

"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 park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed. Question 6 1 / 1 point A Lake Tahoe Community College instructor is interested in the mean number of days Lake Tahoe Community College math students are absent from class during a quarter. X = number of days a Lake Tahoe Community College math student is absent The instructor's sample produces a mean number of days absent of 3.5 days. This value is an example of a: Question 7 1 / 1 point Ski resorts are interested in the mean age that children take their first ski and snowboard lessons. They need this information to plan their ski classes optimally. Identify the sample. Qualitative Quantitative Discrete Quantitative Continuous parameter statistic data variable the population mean age of children who take their first snowboard lesson a subgroup of these children all children who take ski or snowboard lessons

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Question 8 0 / 1 point A marketing company is interested in the proportion of people who will buy a particular product. Identify the statistic. Question 9 1 / 1 point Round the fraction to four decimal places. Answer: 8.6224 Question 10 1 / 1 point Crime-related and demographic statistics for 47 US states were collected from government agencies, including the FBI's Uniform Crime Report. One analysis of this data found a strong connection between education and crime indicating that higher levels of education in a community correspond to higher crime rates. Which of the potential problems with samples the sample mean age of children who take their first snowboard lesson the proportion of the sample who will buy the product all people (maybe in a certain geographic area, such as the United States) a group of the people the proportion of all people who will buy the product 845 98

discussed below could explain this connection? Question 11 1 / 1 point The local news is conducting a poll of the residents' opinions regarding a new traffic law that is being proposed. At the end of a news segment, viewers had the opportunity to dial in or use social media to choose whether they agree or disagree with the law. A large sample size was represented, and this poll was repeated again one week later with similar results. When working with this data, which of the following statements best applies? Question 12 1 / 1 point Round the following number to four decimal places. Make sure you put the 0 in front of the decimal. 0.05262083399 Answer: 0.0526 Question 13 1 / 1 point You are collecting the same data and receive very different results from your classmates. What do you do? Self-selected samples Undue Influence Problems with samples Causality The surveys are biased because people chose to respond or not. Because of the large sample size, the results are most accurate of all members of the community. The same sampling methods were used for both polls, demonstrating reliability.

Question 14 0.334 / 1 point Reevaluate data-taking methods. Average your scores with the class mean. Nothing, it is perfectly fine to have different samples. 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 63 ranked firms. Age FrequencyRelative FrequencyCumulative Relative Frequency 40-44 2 45-49 3 50-54 14 55-59 18 60-64 17 65-69 8 70-74 1 Answer the following questions: What percentage of CEOs are 60 years or older? Round your answer to the nearest tenth.

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41 (41.3) 0.08 (33.4 %) 30 (19) Question 15 1 / 1 point Which of the following could be a cumulative frequency graph? % What is the relative frequency of ages under 50? If responding using a decimal, round your answer to the nearest hundredth. What is the cumulative frequency for CEOs younger than 55? Round to a whole number. Do not include a decimal.

Question 16 1 / 1 point What measurement scale is used in the following example? A satisfaction survey of a social website by number: 1=Very Satisfied 2= Somewhat Satisfied 3=Not Satisfied Question 17 1 / 1 point What measurement scale is used in the following example? Common letter grades: A, B, C, D and F Interval Ratio Ordinal Nominal Interval

Question 18 1 / 1 point What measurement scale is used in the following example? High school soccer players classified by their athletic ability: Superior, Average, Above average: Question 19 1 / 1 point What measurement scale is used in the following example? Color of your hair. Question 20 0 / 1 point What measurement scale is used in the following example? The dates 1066, 1492, 1644, 1947 and 1944 Ratio Ordinal Nominal Nominal Interval Ordinal Ratio Interval Ordinal Nominal Ratio Interval Ordinal Ratio

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MATH302 - W1 Knowledge Check1

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