stimate the critical value of X2

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Question description

For large numbers of degrees of freedom, the critical X2values can be approximated as follows:

where k is the number of degrees of freedom and z is the critical value. To find the lower critical value, the negative z-value is used, to find the upper critical value, the positive z-value is used. Use this approximation to estimate the critical value of X2

 in a right-tailed hypothesis test with n = 146 and α = 0.01. 

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