Two students in a statistics class conduct a study and gather data from 250 samples. Using this data they construct a histogram, below, which shows that the sample is approximately normally distributed. (You may need to enlarge the histogram to see it clearly. ) 20 15 Frequency 10 5 Sample Data The deviation of a data value c is its displacement (positive or negative) from the mean of the data. The standard deviation, then, is a sort of average of all the deviations of all the data. It can be used as a measure of a data value's deviation relative to the entire data set. This sample data has a mean of a = 81.8 and standard deviation s = 12.1. Suppose 21 - 87.85 is a value in this set. What is its deviation? 6.05 How many standard deviations away from the mean is a1? 0.5 Part 2 of 3 Let x2 = 76.9 be a value in this sample. What is its deviation? What is its deviation in terms of the standard deviation? That is, how many standard deviations away from the mean is c2? Hint 1 Hint 2 Submit Part Question 18