1) Rats raised in normal laboratory conditions show a standard deviation of 5.23 in their ability to learn a certain task, according to an established measurement scale. A sample of 30 rats were raised in relatively more crowded conditions. The following data were obtained on the same learning scale: 10.9 11.2 12.0 12.6 12.7 12.9 13.0 13.6 13.9 13.9 14.0 14.0 14.0 14.1 14.2 14.3 14.6 14.9 15.0 15.3 15.8 16.0 16.9 18.0 19.9 22.3 26.1 29.8 35.0 39.0 Does the data indicate a statistically significant change in the variability of scores, as measured by the standard deviation