# In your response postings, evaluate the worksheet of other students, discuss the

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In your response postings, evaluate the worksheet of other students, discuss the calculations, and provide helpful tips on using Excel to accomplish this descriptive statistic.
A related measure of dispersion or spread is the standard deviation. The standard deviation is just the square root of the variance (Render et al., 2018, pg.33).
A standard deviation measures the amount of variability among the numbers in a data set. It calculates the typical distance of a data point from the mean of the data. If the standard deviation is relatively large, it means the data is quite spread out away from the mean. If the standard deviation is relatively small, it means the data is concentrated near the mean (Dummies, 2016).
A variance is the deviation of actual from standard or is the difference between actual and standard (Account Learning, 2015).
Exam Testing
Test Exam Grades Test Minutes Study Time
90 200
80 130
70 100
60 85
50 62
82 145
83 140
73 130
73 125
84 170
74 110
85 160
75 118
65 90
55 60
96 280
86 150
97 228
87 162
87 160
87 150
77 120
88 220
99 240
99 230
standard deviation 13.0477329 56.5913715
STDEVP 12.7841151 55.4479937
STDEVS 13.0477329 56.5913715
variance 170.243333 3202.58333
MEAN 80.08 150.6
SUM 2002 3765
Render, B., Stair, R. M., Hanna, M. E., & Hale, T. S. (2018). Quantitative Analysis for Management. New York: Pearson Education, Inc.
Account Learning. (2015, December 1). Variance analysis | Meaning & definition | Types | Advantages. https://accountlearning.com/understanding-variance-analysis-meaning-definition-types-advantages/
Dummies. (2016, March 26). Standard deviation and variance. dummies. https://www.dummies.com/education/math/statistics/standard-deviation-and-variance/