Stats Ch1 Practice Problems
determine the level of measurement of each axis on a graph of Gender Profile X axis: gender Y axis: number of people
X axis (gender): nominal Y axis (number): ratio
determine the level of measurement of each axis on a graph about Global Warming. X axis: response (very serious, serious, not too serious, not a problem, don't know) Y axis: percent
X axis: (response): ordinal Y axis: (percent): ratio
biased or unbiased: "why does eating whole grain foods improve your health?"
biased
would you use a census or a sampling to find the average age of the 115 residents of a retirement community
census
determine the sampling technique used: questioning students as they leave a university library, researchers ask 358 students about their drinking habits
convenience sample
determine the sampling technique: a journalist goes to a campground to ask people how they feel about air pollution
convenience sample
observational study or experiment: researchers studied 16,461 men and had one group take a daily multivitamin while another group took a daily placevo
experiment
observational study or experiment: to study the effect of music on driving habits, eight drivers drove 500 miles while listening to different genres of mhsic
experiment
determine the level of measurement for the years of birth for the runners in the Boston marathon
interval
determine the level of measurement for the years that a television show won an Emmy: 1955, 1979, 1980, 1981, 1982, 1988, 2010, 2011, 2012
interval
determine the level of measurement: temperature
interval
determine the level of measurement for jerseys numbers for a team of soccer players: 5, 9, 78, 11, 14, 4, 15, 10, 31, 19, 23, 21, 18, 27, 7, 6, 1, 13, 3, 37, 20, 22, 17, 16, 2, 88, 8
nominal
determine the level of measurement: allergies
nominal
determine the level of measurement of the data and whether it is qualitative or quantitative: the regions representing the top salespeople in a corporation for past 6 years are listed: Southeast, Northeast, Southwest, Northwest, Southeast, Southwest
nominal, qualitative
observational study or experiment: in a survey of 177, 237 US adults, 65% said they visited a dentist in the last 12 months
observational study
observational study or experiment: researchers ask 162,576 people for their BMIs and the number of migraines they have per month
observational study
determine the level of measurement for a list of police officers' badge numbers
ordinal
determine the level of measurement for the top 10 grossing films released in a year
ordinal
determine the level of measurement for the top five fiction books of 2012: 1. Threat Vector, 2. Gone Girl, 3. The Forgotten, 4. The Racketeer, 5. Private London
ordinal
determine the level of measurement: pain level (1-10)
ordinal
determine the level of measurement and whether the data is qualitative or quantitative: the top five 2012 albums are listed: 1. Adele "21," 2. Michael Bublé "Christmas," 3. Drake "Take Care," 4. Taylor Swift "Red," 5. One Direction "Up All Night."
ordinal, qualitative
determine the level of measurement of the data of the top five college football teams, and whether it is qualitative or quantitative: 1. Alabama, 2. Oregon, 3. Ohio State, 4. Notre Dame, 5. Georgia/Texas A&M
ordinal, qualitative
parameter or statistic: at a college, 90% of the members of the Board of Trustees approved the contract of the new president
parameter
identify the population and sample of the following study: a study of the dietary habits of 20,000 men was conducted to find a link between high intake of dairy and prostate cancer
population: prostate conditions of all men, sample: prostate conditions of 20,00 men
qualitative or quantitative: a list of debit card PIN numbers
qualitative
qualitative or quantitative: eye colors of models
qualitative
qualitative or quantitative: responses to an opinion poll
qualitative
qualitative or quantitative: heights of hot air balloons
quantitative
qualitative or quantitative: the final scores on a video game
quantitative
qualitative or quantitative: weights of infants at a hospital
quantitative
determine the level of measurement for the horsepowers of racing car engines
ratio
determine the level of measurement: weight
ratio
determine the sampling technique used: chosen at random, 580 customers at a car dealership are contacted and asked their opinions of the service they received
simple random
identify the sampling technique used: using random digit dialing, researchers call 400 people and ask what obstacles keep them from exercising
simple random
parameter or statistic: a survey of 1,000 US adults found that 40% think the internet is the best way to get news and information
statistic
parameter or statistic: a survey of 773 small business owners found that 17% have a current job opening
statistic
determine the sampling technique used: soybeans are planted on a 48-acre field divided into one-acre subplots. a sample is taken from each subplot.
stratified
determine the sampling technique: students at a college are divided by class and interviewed on their opinions on smoking
stratified sample
determine the sampling technique: for quality assurance, every tenth machine part is selected from an assembly line and measured for accuracy
systematic sample
biased or unbiased: "how much do you exercise during an average week?"
unbiased
