4.2 Statistics Homework Week 4.2 Variation measures By changing their diet from liquid to solid, the weight in pounds of 20 babies, in one month, was increased as follows: 0.4, 1.9, 1.5, 0.9, 0.3,...

ANSWERS
The change in the weight of the babies after changing their diet from water to solid I pounds is given, here we are going to find the variation in the measurements.
To find the impact we consider the measures of variation, the four measures of variation are Range, Standard Deviation, Variance, Interquartile Range.
1. Range
It is the difference between the smallest and largest item of the set of information given.
Here the Range is 1.60
Range = 1.90 - 0.30 = 1.60
2. Standard Deviation
It is defined as the positive square root of the A.M. of the squares of the deviations of the observations from their arithmetic mean.
Here SD = 0.50563 = 0.51
3. Variance
Variance measures variability from the average or mean. It is calculated by taking the differences between each number in the data set and the mean, then squaring the differences to make them.
Here Variance = 0.256
4. Interquartile range
Quartiles divide your data into quarters: the lowest 25%, the next lowest 25%, the second highest 25% and the highest 25%. The interquartile range is one of the most popular measures of variation used in statistics. It is a measure of how data is spread around the mean. The basic formula is:
IQR = Q3 – Q1
Here IQR = 1.50 –...