please send me answer in type form strictly prohibited handwritten solution and don't use AI show your own work with step by step explanation.

A sample of 100 test specimens of a steel alloy provides the following breaking strengths ( note that some breaking strengths are put in terms of standard deviations from the mean for your convenience ) . We are working through the steps to determine whether the data are normally distributed at the 5 % significance level if the mean breaking strength is 69.00 ksi and the standard deviation is 3.00 ksi . Assume that the number of bins and the bin boundaries are chosen based upon the distribution of the sample set . What is the Chi squared boundary value we test against ?