# Get Algorithm for approximating complex polynomial zeros (1998) PDF

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15 A negative skew page_103 Page 104 Exercise 30 What is wrong with the following table and figures? Each has at least two faults. 17 Histogram to show favourite animals page_104 Page 105 Scattergrams or scattergraphs These are used to illustrate the findings of correlational research and indicate the pattern of the relationship between two variables. 4 Table to show shoe size at the age of nine and height at the age of eighteen Shoe sixe at 9 Height at 18 P1 1 P2 10 P3 11 P4 1 P5 10 P6 2 P7 8 P8 9 P9 11 P10 12 To plot this data on to a scattergram: 1 Label one axis with height and one with shoe size.

Quota sample In a stratified sample the participants are randomly selected from within these criteria. A quota sample is similar, but here the participants are selected by opportunity sample from within the criteria. This method is often used in market research as it is quicker and cheaper than stratified sampling. The market researcher is told to interview twenty male white-collar workers and twenty female manual workers but can select these by opportunity sample. Thus it is open to some of the same biases as this latter method.

The effects of this are self-explanatory. • Misrecording results. The effects of such carelessness are again obvious. • ‘Fudging’ results in some way. The best known example of this is probably Cyril Burt’s research on concordance rates of IQ in twins (1958), where there are claims that allegedly scores were altered or invented. • Personal attributes. As mentioned above researchers will differ in gender, appearance, race, manner, accent, and so on. The response to a large, male Scot might be different to the response to a shapely, female Italian.