Suppose that your statistics instructor gave six examinations during the semester. You received the following grades (percentage correct): 52. 82. 69, 82. 70. and 81. Instead of averaging the six...

Extracted text: Suppose that your statistics instructor gave six examinations during the semester. You received the following grades (percentage correct): 52. 82. 69, 82. 70. and 81. Instead of averaging the six scores, the instructor indicated he would randomly select 3 grades and report that grade to the student records office. a. How many different samples, without replacement, of 3 test grades are possible? Different samples 20 b. Not available in Connect. c. Compute the mean of the sample means and compare It with the population mean. (Round the final answers to 2 decimal places.) The nean of the sample means is The population nean is Both means are (Click to select) d. Would the result be different from dropping the lowest score? (Click to select) v