CG Board December Assignment-4

Class 12th ENGLISH Assignment-4

Cg Board Assignment-4

 Click Below link Watch Assignment video

 CG BOARD December Assignment-4.     

class 12 business studies in English medium

for more watch this videos

Statistical Economics

 F-test

given by fisher 1920

also known as variance ratio test.

☑️f-test always positive.

☑️small sample test.

☑️f-test value lies between 0 to infinite.

☑️also called test of overall significance of regression.

☑️it is a basis of Anova.

☑️Anova-analysis of variance.

☑️degree of freedom.

Statistical Economics

Z-test

Z-test given by fisher-1913

This is large sample test=n>30

We can avoid degree of freedom

 2- tail test

 less peak (kurtosis)- platykurtic curve

 z test applicable where population correlation coefficient is not zero, than z test is used  

to check to population mean difference

1- if calculated value< table value then H° accept

2-if calculated value >table value then H° reject

this is short note on z test it is important to all competitive exam like economics net KVS PGT economics NVS PGT economics DSSSB PGT economics also for assistant professor economics this is very important topic for who prepare for these exams frequently asked question from this test z test

 Statistical Economics

T-test 

👉t test given by William gossett

Also known as

1-student t-test

2-watch t-test

Introduction:- t test study of population and sample mean

        deviation from population parameter

                          standard error

Application

1-small sample test (n<30) but n- greater than t-test normal looking curve meso kurtik.

2-standard deviation is unknown and variance is unknow.

3-when population increase correlation=0, normal distribution.

4-two tailed test, normal curve, less peak.

this is short note on z test it is important to all competitive exam like economics net KVS PGT economics NVS PGT economics DSSSB PGT economics also for assistant professor economics this is very important topic for who prepare for these exams frequently asked question from this test z test

 Statistical Economics 

 Chi square test

Also known as

 1-test of goodness of fit

2-test of independence

3-test of homogeneity

4-test of population variance

Some important key point frequently 

ask in exams👇

-☑️value value from 0 to 1

-☑️large sample test N>50

☑️applicable on qualitative data

☑️parametric and nonparametric

☑️this is one tailed and two tailed test both

☑️positive skewed

☑️degree of freedom (d.f)=n-k

important formulas

1-mean=d.f

2-variance=2×d.f

3-mode=d.f-2

4-B1[bita]=√2/d.f

this is short note on z test it is important to all competitive exam like economics net KVS PGT economics NVS PGT economics DSSSB PGT economics also for assistant professor economics this is very important topic for who prepare for these exams frequently asked question from this test z test

माँ

माँ
माँ अब तो लौट के आजा ।
तुझ बिन सब सुना-सुना सा लागे हैं।
 क्यो दी ये जिंदगी जब तू भागे हैं ।
घर आगन सब छोड़ गयी क्यो।
अभी इतनी भी न हुयी बडी मैं।
जाना ही था तो क्यो छोडं गयी अकेला।
सबकी माँ देती है सहारा पर तू कहा हैं माँ
क्यो आया ये मोड क्यो हुआ सब उजड़ सी
 गयी हैं हमारी माँ
अब तो आजा ना।