Assuming that the sample statistics you computed are exactly equivalent to the corresponding population parameters, identify the following:What score on Recall1 would correspond to an extremely high s

Descriptive statistics

Casey Johnson

South University

Descriptive statistics can be useful for two purposes:

1) To provide basic information about variables in a dataset and

2) To highlight potential relationships between variables.

Basic statistics used to describe and summarize data. Descriptive statistics generally include measures of the average values of variables (mean, median, and mode) and measures of the dispersion of variables (variance, standard deviation, or range).

Mean -- the sum of a variable's values divided by the total number of values
Median -- the middle value of a variable
Mode -- the value that occurs most often

Range is simply the difference between the smallest and largest values in the data. The interquartile range is the difference between the values at the 75th percentile and the 25th percentile of the data.

Variance is the most commonly used measure of dispersion. It is calculated by taking the average of the squared differences between each value and the mean.

Standard deviation, another commonly used statistic, is the square root of the variance.

Histograms:

Visually represent the frequencies with which values of variables occur

Each value of a variable is displayed along the bottom of a histogram, and a bar is drawn for each value

The height of the bar corresponds to the frequency with which that value occurs.

Histogram of Age, Sex, Height and Year in college are as follows:

Histogram (with Normal Curve) of Age, Sex, Height and Year in college are as follows:

Boxplot of Age, Sex, Height and Year in college are as follows: