P Test-5 - Google Chrome mylab.pearson.com/Student/PlayerTest.aspx?testid=238445912¢erwin=yes Math1221 Test: Test-5 Question 7 of A medical laboratory tested 8 samples of human blood for acidity on the PH scale, with the results below. 7.3 7.2 7.1 7.5 7.3 7.4 7.3 7.2 a. Find the mean and standard deviation. b. What percentage of the data is within 3 standard deviations of the mean? a. The mean is 7.2875 (Type an integer or decimal rounded to four decimal places as needed.) The standard deviation is |0.321 (Type an integer or decimal rounded to four decimal places as needed.) b. The percentage of the data within 3 standard deviations of the mean is %. (Round to the nearest percent as needed.) HOLOSC