Findout the variance also standard deviation

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Reference no: EM1317554

To find the variance and standard deviation for the two distributions

An animal trainer obtained the following data (Table A) in a study of reaction times of dogs (in seconds) to a specific stimulus. He then selected another group of dogs (Table B) that were much older than the first group and measure their reaction times to the same stimulus.

Table A	Table B
Classes	Frequency	Classes	Frequency
2.3-2.9	10	2.3-2.9	1
3.0-3.6	12	3.0-3.6	3
3.7-4.3	6	3.7-4.3	4
4.4-5.0	8	4.4-5.0	16
5.1-5.7	4	5.1-5.7	14
5.8-6.4	4	5.8-6.4	4

Find the variance and standard deviation for the two distributions above. Compare the variation of the data sets. Decide if one data set is more variable than the other.

Reference no: EM1317554

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