Descriptive statistics solve

Sum is simply the sum of the observations – add them up.
Count is the number of observations.
You can use Excel's SUM and COUNTA functions to sum and count the observations.
The first quartile is the median of the data less than the median.

Descriptive statistics helps researchers and analysts to describe the central tendency (mean, median, mode), dispersion (range, variance, and standard deviation), and shape of the distribution of a dataset.

To calculate descriptive statistics: Mean: Add up all the scores and divide by the number of scores. Mean = (85 + 90 + 75 + 92 + 88 + 79 + 83 + 95 + 87 + 91 + 78 + 86 + 89 + 94 + 82 + 80 + 84 + 93 + 88 + 81) / 20 = 1770 / 20 = 88.5. Median: Arrange the scores in ascending order and find the middle value.

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