The following data represent the pH of rain for a random sample of 12 rain dates. A normal probability plot suggests the data could come from 5.20 5.72 4.62 4.80 a population that is normally distributed. A boxplot indicates there are 5.02 4.60 4.74 5.19 no outliers. Complete parts a) through d) below. 5.29 4.76 4.56 5.71 E Click the icon to view the table of critical t-values. (a) Determine a point estimate for the population mean! A point estimate for the population mean is (Round to two decimal places as needed.)