Sir R. A.​ Fisher, a famous​ statistician, showed that the critical values of a​ chi-square distribution can be approximated by the standard normal distribution. FORMULA ATTACHED where v is the degrees of freedom and zk is the​ z-score such that the area under the standard normal curve to the right of zk is k. Use​ Fisher's approximation to find z20.975 and z20.025 with 90 degrees of freedom. Compare the results with those found in the table of the​ chi-square distribution. In​ Fisher's approximation the value of z20.975 is _______.  Find​ Fisher's approximation for z20.025 which is ______. Now find the actual values of z20.975 and z20.025 which is _____. Use a​ chi-square distribution table to find z20.975 with 90 degrees freedom. Which is ______. Use a​ chi-square distribution table to find z20.025 with 90 degrees freedom.  Which is ______.

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Sir R. A.​ Fisher, a famous​ statistician, showed that the critical values of a​ chi-square distribution can be approximated by the standard normal distribution.

FORMULA ATTACHED

where v is the degrees of freedom and zis the​ z-score such that the area under the standard normal curve to the right of zis k. Use​ Fisher's approximation to find z20.975 and z20.025 with 90 degrees of freedom. Compare the results with those found in the table of the​ chi-square distribution.

In​ Fisher's approximation the value of z20.975 is _______. 

Find​ Fisher's approximation for z20.025 which is ______.

Now find the actual values of z20.975 and z20.025 which is _____.

Use a​ chi-square distribution table to find z20.975 with 90 degrees freedom. Which is ______.

Use a​ chi-square distribution table to find z20.025 with 90 degrees freedom.  Which is ______.

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