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.

{8, 12, 27, 32, 45, 57, 61, 73, 82, 94}

a.40%; this percentage is lower than expected in a normal distribution.

b.50%; this percentage is lower than expected in a normal distribution.

c.60%; this percentage is lower than expected in a normal distribution.

d.70%; this percentage is close to the expected percentage in a normal distribution.