Data Summaries resources

5 questions. 1. Choosing whether given random variables are qualitative or quantitative. 2. Deciding whether or not three sampling methods are simple random sampling, stratified sampling, systematic or judgemental sampling. Also whether or not the method of selection is random, quasi-random or non-random.3. Given a table of the number of days in which sales were between £x thousands and £(x+1) thousands find the relative percentage frequencies of these volume of sales.4. Given random set of data (between 13 and 23 numbers all less than 100), find their stem-and-leaf plot. 5. Given sample data find mean, standard deviation, median, interquartile range. Numbas resources have been made available under a Creative Commons licence by the School of Mathematics & Statistics at Newcastle University.