The following data were collected on 300 eight-year-old girls. Test, at the .05 level of significance, the null hypothesis that the data are drawn from a normally distributed population. The sample mean and standard deviation computed from grouped data are 127.02 and 5.08.

Height in Centimeters Observed Frequency Height in Centimeters Observed Frequency 114 to 115.9 5 128 to 129.9 43 116 to 117.9 10 130 to 131.9 42 118 to 119.9 14 132 to 133.9 30 120 to 121.9 21 134 to 135.9 11 122 to 123.9 30 136 to 137.9 5 124 to 125.9 40 138 to 139.9 4 126 to 127.9 45 Total 300