Brainliest + points! does anyone know how to do this? for the following data set, calculate the percentage of data points that fall within one standard deviation of the mean, and compare the result to the expected percentage of a normal distribution. {55, 54, 66, 38, 53, 56, 57, 66, 45, 65} a. 50%; this percentage is lower than expected in a normal distribution. b. 60%; this percentage is lower than expected in a normal distribution. c. 70%; this percentage is close to the expected percentage in a normal distribution. d. 80%; this percentage is higher than expected in a normal distribution.