What is the probability that the researcher will correctly reject the false null hypothesis that the population mean for the new method is 75 or lower? The researcher assumes that the population s...What is the probability that the researcher will correctly reject the false null hypothesis that the population mean for the new method is 75 or lower? The researcher assumes that the population standard deviation with the new method is the same as with the old method (10) and that the distribution is normal. Therefore, the probability that the experimenter will reject the null hypothesis that the population mean of the new method is 75 is 0.80.