# Elementary Statistics Questions and Answers

## Questions on Elementary Statistics

Statistics is one of the most important and powerful tool which is helpful in all the fields of work. The branch of mathematics that deals with the study of the collection, organization, analysis, interpretation and presentation of data (information) is referred to as Elementary Statistics. On this page you’ll come across some of the rules, formulas and questions on elementary statistics. This field can be categorized into two parts which are – Descriptive Statistics and Inferential Statistics.

• Descriptive statistics are a series of short descriptive coefficients that summarize a data set, which might be a representation of the complete population or a sample of the population. Measures of central tendency and measures of variability are two types of descriptive statistics (spread).
• Inferential statistics are used to generate generalizations about a population using data from samples.
This entails using a statistic from your sample data (such as the sample mean) to make a claim about a population parameter (i.e. the population mean).

### Rules for Elementary Statistics

Mean:Mean can  be defined as the sum of all the elements divided by number of all elements.

$Mean=\frac {\text{sum of all the elements}}{\text{number of elements}}$

Median:Median is defined as the middle value of a set of data. If a set consists of an odd number of values, then the middle value will be the median of the set.Else, if the set consists of an even number of sets, then the median will be the average of the two middle values.

Mode:The mode can be defined as the most frequent value in the given set of data.

Variance:Variance is used to calculate the standard deviation.It is always positive.

Standard deviation:It is the square root of the variance.

Also Read – Formulas for Elementary Statistics

How to solve Quickly Elementary Statistics

Tips and Tricks on Elementary Statistics

Question 1

Time: 00:00:00
If the variance of 5 values is 10.6. What is the standard deviation of those values

4.35

4.35

3.25

3.25

2.85

2.85

25.65

25.65

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