<prompt> The postoperative quality of life QOL scores of 200 prostate cancer patients have a mean of 60 and a standard detion of 10. How many patients are expected to have a QOL score between 40 and 80?190136120140  <response>: The values enclosed in a normal distribution curve are:Mean - 1 SD 68 of data Mean - 2 SD 95 of dataMean - 3 SD 99 of dataIn the above question,Mean 60SD 10Hence, the range of values from 40 to 80 i.e. 60 - 20 Mean - 2 SD would include 95 of the readings.Therefore, the total number of readings in the given range 95 x 200 100 190Hence, 190 patients are expected to have a QOL score between 40 and 80. 