b) Weight (in pounds) of babies born in the past few months is given below. Use a TI-83, TI-83 Plus, or TI-84 calculator to test whether the mean weight of babies born at the hospital in the last month is different than the historical average of 7.63 pounds. Identify the test statistic, z, and p-value from the calculator output, rounding to two decimal places. 6.3 8.2 7.4 7.1 7.5 6.7 9.2 5.8 7.8 6.0