a. What is a range, variance, Mean Absolate Deviation and
Standard Deviation?
b. Give the formulas in finding the 4 measures of variability or
group and ungrouped data

Can you help me :>

The mean absolute deviation is the arithmetic average of the absolute deviation of all sample data around the mean. ... MAD = (∑|Xi-(X-bar)|/n. The variance is defined as the average of the squared deviations from the mean.

The variability of a data set as measured by the number R=xmax−xmin. The variability of sample data as measured by the number √Σ(x−ˉx)2n−1. The variability of population data as measured by the number σ2=Σ(x−μ)2N.

Rudybahandiviz Rudybahandiviz · Answer 2

1. •°•°•°•°•

Range = the difference between the highest and lowest numbers.

Variance = how spread out (far away) a number is from the mean.

Standard Deviation = loosely defined as the average amount a number differs from the mean.

ABSOLUTE DEVIATION

The average absolute deviation of a data set is the average of the absolute deviations from a central point. It is a summary statistic of statistical dispersion or variability.

MEAN

add all the member then divide by the amount of numbers.

2.★★★

The measures of variability allows us to know how spread our scores/ data ma'am. The measures of variability for ungrouped and grouped data ma'am are range, mean deviation, variance, and standard deviation.