Exam 1: The Where,Why,and How of Data Collection

A cell phone service provider has 14,000 customers.Recently,the sales department selected a random sample of 400 customer accounts and recorded the number of minutes of long distance time used during the previous billing period.The company analyst used Excel to sort these values in order from high to low.She then assigned the highest value a rank of 1,the next highest value a rank of 2,and so forth.These ranks would be considered to be ordinal data.

A sampling plan that requires a person to interview 100 people as they exit a department store would most likely be:

When the California Highway Patrol states that a study of drivers on a rural highway shows that the average speed is between 62.5 mph and 64.5 mph,they are most likely basing this statement on:

Open the data file provided with the text called Computer Use.Indicate the level of data measurement for each variable in the data set.

The difference between interval data and ratio data is that interval data has a natural zero.

Recently,a bank manager pulled a sample of customer accounts and recorded data for two variables,checking account balance and total number of transactions during the previous 30 days.The data collected would be considered time-series data.

For which data collection method is it most important to have a polished-looking survey form?