MATH 221 Week 1 Quiz

1. Question: (CO 1) A survey of 385 people who like wild sweaters found that 74% had a wild holiday sweater. What is the population and what is the sample? 2. Question: (CO 1) A survey of all 35 employees at a small company finds that 89% of them like the recent changes to the company’s benefits. Is this percentage a parameter or a statistic and why? 3. Question: (CO 1) Classify the data of the heights of ladders produced by a tool company. 4. Question: (CO 1) The data set that lists the number of performances for each Broadway show in 2017 would be classified as what type of data? 5. Question: (CO 1) A data set that includes the shows on a station during the day would be classified as what type of data? 6. Question: (CO 1) What type of data collection might be best to estimate whether a new medicine is more effective in curing the common cold than aspirin? 7. Question: (CO 1) What type of data collection might be best to study how many books students bring into the media center during finals week? 8. Question: (CO 1) You need to study the satisfaction of customers of a specific restaurant. You decide to order food and talk to those customers sitting next to you. This would most closely describe which type of sampling technique? 9. Question: (CO 2) Which of the following graphs would be a Pareto chart? 10. Question: (CO 1) In a normally distributed data set of how long customers stay in your store, the mean is 43.5 minutes and the standard deviation is 3.9 minutes. Within what range would you expect 95% of your customers to stay in your store? 11. Question: (CO 1) Which of the following graphs would be considered normally distributed? 12. Question: (CO 1) In a normally distributed data set with a mean of 22 and a standard deviation of 4.1, what percentage of the data would be between 17.9 and 26.1? 13. Question: (CO 1) Which of the following would be the standard deviation for this sample data set: 5, 7, 3, 9, 2, 4, 4, 9, 5, 9, 3? 14. Question: (CO 1) What would be the mean of this data set: 8, 9, 7, 508, 7, 1, 5, 3, 4? 15. Question: (CO 1) A political campaign wants to know the public’s reaction to their candidates latest policy initiative. What type of study would be best suited to make this determination? 16. Question: (CO 1) To gather information on customer satisfaction, a researcher goes into the local store and interviews six randomly selected customers. This sampling technique is called: 17. Question: (CO 1) What is the standard deviation and its meaning in the sample of customer ages? 45, 76, 30, 22, 51, 40, 63, 66, 27 18. Question: (CO 1) What is the mode of the following data set? 2, 2, 3, 3, 3, 4, 4, 5, 5, 6, 7, 7, 8