In the real time most of the variables are not normally distributed and most of the parametric statistics test(ANOVA,T test, Regression etc..) are based on the assumption that the data is normally distributed therefore it do not meet the assumptions of statistical tests if the data is not normally distributed,in this case the results willContinue reading “Data Tranformations”
Tag Archives: z score
Exercise for Z values
We will solve some simple problems to identify the area using z table. Below image will tells you which Z table we need to use. z tables. P(Z>2.4) We need to look in to right z table as it is greater than mean 0.As per the table, the value is 0.4918 (look at the column 2.4Continue reading “Exercise for Z values”
Normal distribution and exercise
In normal distribution standard deviation will be one and mean will be greater than zero, where in standard normal distribution mean will be zero and standard deviation will be one. We can very well convert normal distribution to standard/Z distribution with below formula.Because Z table is very easy to find the probability area. We haveContinue reading “Normal distribution and exercise”
How to calculate area using left and right Z table
We need to find the left area of the Z score 0.70 ,see the below.screenshot for more idea First we will find area by using below left Z table. Step 1: If we have any second level decimal values like 0.71 then we need to split in to 0.7 and 0.01, see the above tableContinue reading “How to calculate area using left and right Z table”
Data and Machine by viswateja 