Line segment AB measures 18 units. A number line with no numbers. A closed circle above the line is labeled A. A closed circle nine notches down the line is labeled B. The space between point A and the next notch is labeled d. What is d, the distance between tick marks on the number line? 1 unit 2 units 3 units 9 units

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95