5. Scientists have developed a type of corn whose protein quality may help chickens gain weight faster than the present type used. To test this new type, 20 one-day old chicks were fed a ration that contained the new corn while another control group of 20 chicks was fed the ordinary corn. 5% level, whether the combined data can be considered to be a sample from a normal population The following frequency table gives the observed frequencies for the combined sample. Test, at the with a mean of 380 and a standard deviation of 50. Be sure to write the hypotheses, give the p-value of the test, and interpret the results in context. Weight gain 271-310 Observed 2 311-350 9 351-390 8 391-430 15 431-470 6