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4. (10pts)For each of the data set below, find the mean (i) and standard (1) (4pts) 10 (2) (4pts) 20 18 16 12 14 (3) (2pts) From the results of (1) and (2), what do you think the standard deviation is for the numbers (101, 103, 105, 107, 109)? (In generol, ony S consecutive even numbers or s numbers should have exactly the same stondard deviation, since their spread are of 2
(6pts) Mean is a measure of the center of the data, and standard deviation is a measure of the spread of the data. For each of the following groups of data, compare their mean and standard deviation without calculations. (Be familiar with the symbol notations.X is mean, while S is standard deviation. We use subscripts to differentiate between groups. For example:&, andX SA and SB. Put <.> or on each of the blank) (1) (2pts) 5. Group A 1.3 1.7 1.9 2.1 (2) (2pts) Group Q Group R 21 23 25 27 29 (3) (2pts) S, 6. (6pts) Resistant in statistics means that the measure is not being affected whether or not there resistant measures? Mean () STD standard deviation (s) a1- first quartile Median: Variance Square of the standard deviation: IQR-inter-quartile-range:
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