MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1 In a city of 50,000 households, 200 were randomly sampled and the heating bill for January was recorded. The standard deviation of these 100 values wa

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In a city of 50,000 households, 200 were randomly sampled and the heating bill for January was recorded. The standard deviation of these 100 values was then computed. The standard deviation is a: 1) A) parameter B) interquartile range C) range D) statistic 2) A scientist is testing the hardness of a new type of ceramic and controls the contents of the mixture as well as the oven temperature. This is an example of: 2) A) a longitudinal study B) an experimental study C) an observational study D) a cross - sectional study 3) A scientific team collects water samples from a fresh - water lake to measure levels of a certain pollutant. For the team, this constitutes: 3) A) tertiary data B) primary data C) population data D) secondary data 4) You have a population of 500 numbers from which you wish to randomly sample 50 of them. The best approach is: 4) A) sort the data from lowest to highest and pick the first 50 B) add the digits in each number, sort by the sum and pick the first 50 C) put the data in a spreadsheet column, generate random numbers in the next column, sort by the random numbers and pick the first 50 D) sort by the number of threes in each number and pick the first 50 5) A polling firm conducts a survey for a political party to determine the level of support for the party's policies. If a third party then observes the poll results, for this third party this constitutes: 5) A) population data B) tertiary data C) secondary data D) primary data 6) A survey has a convoluted question in which the respondent might answer incorrectly in spite of not clearly understanding the question. This is an example of: 6) A) coverage error B) sampling error C) processing error D) response error 7) A secretary does data entry for a survey conducted by paper. If a value is entered incorrectly, this is an example of: 7) A) sampling error B) nonresponse error C) coverage error D) processing error 8) You interview people coming out of a store to see how much they spent. The data type is: 8) A) secondary B) six - sigma C) primary D) tertiary 1 Chapter 1 Analyzing Data and Making Decisions Statist ics for Business Microsoft Excel 2010 Updated 2e Judith Skuce (Test Bank All Cha pters, 100% Original Verified, A+ Grade) Answers At The End Of Each Cha pter 1 / 4

9) Restaurants have survey cards that people can fill out. The people who fill out the cards are an example of: 9) A) self - selected sample B) stratified sample C) convenience sample D) simple random sample 10) You ask all the residents of an apartment building how many times a month they eat out and then compute the average for all the residents. This average is a: 10) A) median B) parameter C) statistic D) mode 11) You have a list of people to call for a survey. However, the list is 5 years old. This is an example of: 11) A) coverage error B) processing error C) nonresponse error D) sampling error 12) A class of 60 students writes a test out of which you randomly sample 10. The difference between the average of this sample and that of the entire class is an example of: 12) A) sampling error B) processing error C) nonresponse error D) coverage error 13) In a city of 100,000 people, you survey 100 of them to ask how much they spend per month on gasoline. You then compute the average for this sample of 100 people This average is a: 13) A) statistic B) mode C) parameter D) median 14) A computer was used to calculate certain statistics from data. However, one of the formulas was set up incorrectly. This is an example of: 14) A) sampling error B) processing error C) estimation error D) response error 15) You mail a survey to 500 people, but receive back only 67. This is an example of: 15) A) processing error B) nonresponse error C) coverage error D) sampling error 16) You consult a Stats Canada publication to find out the populations of a number of cities. The data type is: 16) A) tertiary B) six - sigma C) primary D) secondary 17) While standing outside a store, you record the gender of a person coming out of the store. This is an example of: 17) A) a longitudinal study B) an observational study C) a cross - sectional study D) an experimental study 18) A poll was conducted of executives in a certain industry. However, not all of them could be contacted in the time frame of the survey. This is an example of: 18) A) nonresponse error B) estimation error C) processing error D) sampling error 19) Polling firms can sample telephone numbers for any city in Canada from a CD. If a polling firm samples 1,000 numbers for a city of 500,000 from a CD with no regard for what part of the city the number is from, this is an example of: 19) A) stratified sample B) convenience sample C) self - selected sample D) simple random sample 2 2 / 4

20) A store, upon opening, handed out a survey to the first 10 customers that came in. This is an example of: 20) A) convenience sample B) self - selected sample C) cluster sample D) simple random sample 21) In a survey of 1,000 Canadian households, a polling firm asked the respondents how much they spend per month on entertainment. The firm then calculated the standard deviation of the 1,000 values. The difference between the standard deviation of this sample and that of the entire population is an example of: 21) A) coverage error B) sampling error C) processing error D) nonresponse error 22) You post a poll on a website in which a maximum of 100 respondents is allowed. This is an example of: 22) A) cluster sample B) self - selected sample C) simple random sample D) stratified sample 23) A researcher in a grocery store takes note of whether a customer goes to a regular checkout or the express checkout. This is an example of: 23) A) an experimental study B) a longitudinal study C) an observational study D) a cross - sectional study 24) In a factory with 100 workers, management computed the total number of sick days in the previous year for each worker. They then computed the standard deviation of the number of sick days for all the workers. The standard deviation is a: 24) A) range B) interquartile range C) parameter D) statistic 25) A researcher is comparing twins on the length of time to complete a test. The researcher designed the test and uses an accurate watch to time the results. This is an example of: 25) A) an observational study B) a cross - sectional study C) an experimental study D) a longitudinal study SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 26) A person is doing data entry from a paper survey. If the person makes a mistake entering a value, in a word, what type of error is this? 26) 27) You are sitting outside a store, counting how many people per hour enter it. In a word, what type of study is this? 27) 28) You conduct a one - question survey with the first 5 students entering a classroom. In a word, what type of sample is this? 28) 29) You are trying to phone IT executives to conduct a survey. However, most of them have voice mail set up to capture incoming calls; consequently you never reach them. In a word, what type of error is this? 29) 3 3 / 4

30) A scientist designs a study to measure the amount of impurities removed from oil samples, carefully controlling the factors which may impact the results. In a word, what type of study is this? 30) 31) You conduct a door - to - door survey to see if the residents own or rent. In a word, what type of data is this? 31) 32) An interviewer inflects his/her voice in such a way that it may influence the answer given by the respondent. In a word, what type of error is this? 32) 33) In a company with 12 employees, you ask all 12 of them how many hours a week they work. If you compute the average of all 12 data points, in a word, what is this an example of? 33) 34) In a city of 500,000 people, 500 were surveyed to determine how many times per month they take public transit. If the mean of this sample is computed, in a word, what type of error is the difference between this mean and the population mean? 34) 35) In a company with 500 employees, you sample 50 and examine how many sick days they took last year. If you compute the standard deviation of these 50 data points, in a word, what is this an example of? 35) 36) You read the results of a research study in a journal. The data is listed in an appendix. If you use this data, what type of data is it, in a word? 36) 37) You have a list of people to call for a survey but you are not sure how old the list is. If you call a number of this list and find it is out of service, in a word, what type of error is this? 37) 38) This Section Intentionally Left Blank 38) 39) You examine the results of a survey conducted in 1999 asking companies which of them were Y2K ready. In a word, what type of data is this? 39) 40) You conduct an experiment in which you measure the amount of methane produced by a certain chemical reaction. In a word, what type of data is this? 40) 41) In a survey, people are willing to answer the main questions, but reluctant to answer demographic questions such as income. If a person does not answer the income question, in a word, what type of error is this? 41) TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 42) A question in a survey is phrased in such a way so as to elicit a certain response. This is an example of response error. 42) 43) A frame is essentially a database of a population. 43) 44) In 1995, a group of researchers interviewed people to find out which of them used email. If you look up the results of this research, this would be an example of secondary data. 44) 4

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