7.89 ● Consider the following sample of 25 observations on the diameter x (in centimeters) of a disk used in a certain system:

16.01 16.08 16.13 15.94 16.05 16.27 15.89 15.84 15.95 16.10 15.92 16.04 15.82 16.15 16.06 15.66 15.78 15.99 16.29 16.15 16.19 16.22 16.07 16.13 16.11 The 13 largest normal scores for a sample of size 25 are 1.965, 1.524, 1.263, 1.067, 0.905, 0.764, 0.637, 0.519, 0.409, 0.303, 0.200, 0.100, and 0.

The 12 smallest scores result from placing a negative sign in front of each of the given nonzero scores.

Construct a normal probability plot. Does it appear plausible that disk diameter is normally distributed?

Explain.