What is the proper definition for the p-value? A Probability of the sample data obtained (e.g., sample mean). B Probability of the population data obtained (e.g., population mean) C Probability of the population data obtained (e.g., population mean) if the null hypothesis is true (e.g.. sample mean is equal to 5). D Probability of the sample data obtained (e.g., sample mean) if the null hypothesis is true (e.g. population mean is equal to 5) What two elements do you need to know to calculate the t-critical value? a Sample size and mean B Degrees of freedom and the mean C Degrees of freedom and chosen alpha level D Sample size and chosen alpha level