# PSY 315 Week 3 Individual Assignment - E-Text Assignment Version 2

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Prepare a written response to the following assignments located in the text:Chapter 2, Practice Problems: 11, 12, 13, 16, 21 Chapter 3, Practice Problems: 14, 15, 22, 2510.(a) Describe the variance and standard deviation.
(b) Explain why the standard deviation is more often used as a descriptive statistic than the variance.
11. For the following scores 2, 2, 0, 5, 1, 4, 1, 3, 0, 0, 1, 4, 4, 0, 1, 4, 3, 4, 2, 1, 0 find (a) mean - 2(b) median - 2(c) sum of squared deviations - 51.8
12. For the following scores: 1,112; 1,245; 1,361; 1,372; 1,472 find the (a) Mean - 1272.5
(b) Median - 1236.5(c) Sum of squared deviations - 44249Differences _ -160.5,-27.5, 88.5, 99.5Differences Squared _ 25760.25, 756.25, 7832.25, 9900.25(d) Variance - 11062.25(e) standard deviation - 105.17723137637713. For the following scores, 3.0, 3.4, 2.6, 3.3, 3.5, 3.2 find the (a) Mean - 3.16(b) Median - 3.25(c) Sum of squared deviations - 0.532Differences - -0.16, 0.24,-0.56, 0.14, 0.34Differences Squared - 0.0256, 0.0575999999999999, 0.3136, 0.0195999999999999, 0.1156(d) Variance - 0.1064(e) Standard deviation - 0.326190128606002