**Statistics**

**:**a branch of mathematics dealing with the collection, analysis, interpretation, and presentation of masses of numerical data

**:**a collection of quantitative data

# Calculating the mean

The following table shows the distance from Tessa's house to her favorite locations.

Location | School | Library | Park | Movie theater |
---|---|---|---|---|

Distance from Tessa's house (in kilometers) | 3 | 5 | 4 | 4 |

**Find the mean distance.**

**3+5+4+4/4 =16/4 =4**

**to ans is 4**

**2ed question**

Anduin casts a variety of healing spells. The number of health points that each of his healing spells restores is listed below.

**Find the mean number of health points. = 31**

**solve => 43+57+30+18+26+12/6 = 186/6 = 31**

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# Calculating the median

The following data points represent the number of attendees at each of the private dance events hosted by Fenel Arrangements.

**Sort the data from least to greatest.**

Find the median number of attendees.

**33,34,38,42,47,47,48,49,51 = 47**

first you set value in small to large then fine medial value

**45,78,80,90 = 79**

**20,52 54,56,58,60,80 =56**

this 7 number in row to find median value 3 value right side or 3 value left side and median value is 56

**20,30,40,50 =35**

medial value is 30 or 40 to , 30 or 40 median value is 35 to your ans is 35

**=================================**

# mode

# your number in most common number (repeated ) value fiend

# like ex => 4,3,1,6,1,7,1 = 1

# 45,48,45,56,78,15,45,89,71 = 45

# ============================

Standard DeviationEX :1 your value is 82,93,98,89,88

Ex :2 your value is 76,84,69,92,58,89,73,97,85,77

=======================

**Normal Distribution & Probability Problems**

https://www.wolframalpha.com/widgets/view.jsp?id=8ab70731b1553f17c11a3bbc87e0b605

**Variance**

**1st type to solve**

**Range**

IQR

your value of data = 6,9,14,10,5,8,11

1st set value small to big value = 5, 6 , 8 , 9 , 10 , 11, 14

2st you find medal value to = 9

5, 6 , 8 , 9 , 10 , 11, 14 = your medal value is 9

3rd fiend next medal value = 5, 6 , 8 , 9 , 10 , 11, 14

6 or 11 is medal value

IQR = 6-11 = 5

your answered is = 5

**Correlation Coefficient**

your ans is r = -1 then your 2ed graph X△ Y ⛛

**Conditional Probability**

**Priors , posteriors , maximum likelihood Descriptive statistics**

**inferential Statistics , Regression , Hypothesis testing , A/B testing**

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