Solve the Problem $\chi ^ { 2 }$ Values Can Be Approximated as Follows

Multiple Choice

Solve the problem. For large numbers of degrees of freedom, the critical $\chi ^ { 2 }$ values can be approximated as follows: $x ^ { 2 } = \frac { 1 } { 2 } ( z + \sqrt { 2 k - 1 } ) ^ { 2 }$ , 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 $\chi ^ { 2 }$ in a two-tailed hypothesis test with $n = 104$ and $\alpha = 0.10$ .

A) $\chi ^ { 2 } \approx 80.300$ and $\chi ^ { 2 } \approx 127.406$
B) $\chi ^ { 2 } \approx 84.992$ and $\chi ^ { 2 } \approx 121.646$
C) $\chi ^ { 2 } \approx 85.903$ and $\chi ^ { 2 } \approx 122.735$
D) $\chi ^ { 2 } \approx 81.186$ and $\chi ^ { 2 } \approx 128.520$