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GCSE F Unit 1 CH 3
Collecting Data
| Question | Answer |
|---|---|
| If I collect information about the age of Open University students from the internet, is my data primary or secondary? | Secondary |
| What type of data are the answers to the question "What colour car do you drive?", qualitative or quantitative? | Qualitative |
| Which of the following data are discrete? a) Heights of basketball players b) The length of rat intestines c) Time taken to run 100m | None - they are all continuous data |
| What type of data are the number of pages in a sample of student textbooks? Qualitative, quantitative, discrete, or continuous? | Quantitative discrete |
| List out some key words associated with discrete data. | Number of, how many of, count |
| List out some key words associated with continuous data. | Measure, units of measurement e.g cm, m, kg, sec, ml, degrees |
| What is a sample and why would I take one? | Part of the whole population with the sa?me features, taken to save time and money |
| List 5 methods of collecting data. | Face to face survey, post/e-mail survey, observation, controlled experiment, data logging |
| List 2 things that are wrong with the following question in a survey: "How often do you play sport?: a) Very often b) Often c) Never " | It does not specify a time frame e.g. in a week, it does not quantify very often and often (e.g. every day?, 5 times a week?) |
| If in a survey question I offer a choice of controlled answers, list 2 things I must avoid in range of options I offer. | Gaps (e.g. 3-5 and then 9 -11, missing 6-8) and overlaps (e.g. 3-5, 5-7: what do I tick for 5?) |
| What is 'raw' data? | Data collected but not organised in any way |
| What is a tally chart? | The simplest way to organise data by representing 5 with 4 strokes and a line through them |
| List 2 columns In a frequency table | Type of data (e.g colour or size) and frequency (how many of each) |
| What is a two way table? | They show more than one characteristic of the data at one time e.g. boys and girls, those who like sport and those who don't |
| In a survey 50 children were asked if they liked chocolate, 15 boys didn't like chocolate, a total of 26 girls were asked, how many boys liked chocolate? | 9 |
Created by:
sandy archer
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