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hi everyone in this video we will learn reliability and validity of the data how we have to check and reliability and validity because that is for the questionnaire whether is our questionnaire is reliable or valid and valid so let me start i have already taken 100 respondents data you can see here this is my spss file and already in the variable view you can see i had already defined because i had collected on the uh likert scale now what we have to do with this data first we will learn how we have to check the reliability letamp;#39;s say i will go there here is analyze then scale then reliability analysis so i will transfer all the variables i mean all the items to towards the right hand side rather than total so what we have to check run back alpha right so we will click here okay scale if item deleted right items also and uh rest is fine right run by california continue then we have to press ok so now you can see for my questionnaire chronic alpha is 0.907 and it is very good num