Please briefly explain all the bullet points. Math 338 Math 338 Study Guide for
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Please briefly explain all the bullet points.
Math 338 Math 338 Study Guide for Final Exam Math 338 Study Guide for Final Examm Chapter 1. Looking at Data - Distributions Know the difference between population and sample Know the difference between population parameters and sample statistics Identify the types of variables Understand the measures of center: mean vs. median Know the shapes of distributions, and the relative locations of mean and median Understand the measures of variability: variance, sd, range, lQR Know the five-number summary, boxplot, and outliers Know the effects of linear transformations on mean a Calculate z-scores and understand its meaning . . .Explanation / Answer
Population: In Statistics population is an aggregate of objects, animate or inanimate under study. for example all the specified crop in the region.
Sample: A finite subset of statistical individuals in a population is called a sample. for example some field of the specified crop from the given region.
Population parameters are constant obtained from all the values of the variables. for example population mean, population standard deviation. population correlation coefficients.
Sample statistics are the functions of sample values which are used to estimate population parameters. for example: sample mean, sample variance, sample standard deviation etc.
In statistics there are four types of variables as:
1) Nominal scale: eye color, names of cities.
2) ordinal scale: class of people, grade in examination
3) interval scale: temperature
4) Ratio scale: Height of person Weight of person.
when the data set include extreme values then we used median as central tendency because median is least affected on extreme values.
mean depend on all the values and the change in any one value then there is change in mean also.
In general median is not change when we change the extreme values.
Median is positional average but mean is not positional average.
median can be calculated graphically but mean is not calculated graphically.