Let6

Systems of linear equations

<h1>Questionnaire</h1> <ol> <li>State whether each of the following data is numerical or categorical: (a) <li>the colours of the cars in a showroom</li> <li>the number of houses on your street</li> <li>the types of animals on a farm</li> <li>the blood groups of the students in your class</li> <li>the number of countries in the EU</li> <li>the different nationalities of Premier League soccer players.</li> </ol></li> <li>Ella wants to buy a new computer. She looks on the internet for information to answer the following questions. (b) <ol> <li>How much is a computer monitor?</li> <li>In what colours are the monitors available?</li> <li>What are the sizes of the monitors?</li> <li>How big is the computer’s hard drive? For each question, write down if the data required is numerical or categorical.</li> </ol></li> <li>Louise spends her summer holiday working in a shop that hires out hats for weddings and other functions. Give one example of (c) <ol> <li>numerical data</li> <li>categorical data that could associated with hats.</li> </ol></li> <li>State whether each of the following results is numerical or categorical data. (d) <ol> <li>Standing at a supermarket exit door and asking the customers what they thought of the service they had received.</li> <li>Checking Garda records to find the number of road-traffic accidents that occurred during the past month.</li> <li>Counting the number of cars that turn left at a particular junction.</li> <li>Checking the internet to find the most popular cars.</li> <li>Asking all the students in your class to give the numbers of sisters and brothers they have.</li> </ol></li> (e) <li>Daniel wrote down the numbers of minutes his phone calls lasted. 1, 6, 10, 3, 1, 24, 25, 30, 36, 17, 19, 11, 16, 18, 4, 3, 7, 2, 1, 4, 17, 19, 23, 26 Make a copy of this data collection sheet. Fill it in. What percentage of calls lasted between 11 and 20 minutes inclusive?</li> </ol>