Statistics Test

3 ∑ x3 = x=1

---------means every member of a population has an equal chance of being selected

Every member of a group together are called as ---------------

_____ is used to normalize values coming from two different distributions

------------is a small set of random members of the population

------------- is the collected observations we have about something

When we look to find an ------------or specific value in a population we are dealing with proportion

In Bivariate,Y-axis is said to the independent variable

-----------ensures that groups within a population are adequately represented

------a population improves overtime,it may be due to lesser members leaving the population due to death,expulsion,etc

Another way to describe data is through quartiles and --------------

A third and often less precisemethod of sampling is-------------

if variance is 25, then standard deviation is

Sample is subset of Population

A common practice is to set a-------that is 1.5times the width of IQR, to identify the outlier

Levels of measurement are nominal,ordinal,interval and ratio

Bivariate data can show causality

median of {1,2,3,4,5,4,3,2,2,2} is

mode is the ------------

start with an assumption called the ----------------------

The goal of ANOVA is to separate two different aspects of the total variance

Range,variance,standard deviation are meant to be---------------

the sum of square distances from each point to the mean is called

What was the average return?- is an example of

……………………………compares two variables

-----------------making too few observations or omitting entire segments of a population

How far from the average did individual values stray? Is an exmple of

------------------is the application of statistical methods to real-world qustions

ANOVA considers two types of variance, between groups and within groups

{1,2,3,4,5,6,7}, the range for this series is

mean of {1,2,3,4,5,4,3,2,2,2} is

Anything inside the fence is the outlier

the SAMPLE variance is also called as and the POPULATION variance

------is the mathematical science behind “what can I know about a population if I’m unable to reach every member?”

mode of {1,2,3,4,5,4,3,2,2,2} is

------------------a subset of members that time and resources allow you to measure

Data helps to predict future behaviour but not to analyse past

A common way to compare two variables is to compare their variances by measuring their ------------------

The mean can be influnced by --------------

A ------------------is used to determine the probability of an observed frequency of events given an expected frequency

If we fail to reject a null hypothesis that should have been rejected we’ve committed a____

The value of Factorial of 5 (5!) is

Chi-square statistics will perform well for small expected frequencies

If the null hypothesis is rejected then we say the data supports another mutually exclusive ----------------------

median is the ------------------

Data can be continous or categorical

Sample mean for {1,2,3,4} is

SSE=

The exponents value of 53

Whenever we say something like in "%" or "most" we are dealing with --------------

In Quarties, every data point is considerd, and not the aggregated sum

Measure of central tendency --------,-----------,------------

µ is the symbol of Sample mean

Scatter plots used to find ----------between two variables

In Bivariate, the X-axis set to the -------------

which quartile is also called as median

mean is the ------------

Range=-------------

Sum of squares error(SSE) is

What makes sampling such a good statistical tool is the