(Q7) The mean of these data values is approximately 20 (meaning 20 percent) and the standard deviation is approximately 10 (meaning 10 percentage points). Each value in the data set has a deviation from the mean. The standard deviation tells us that the typical deviation from the mean is about 10 percentage points. histogram of 1000 counties. Frequency of bachelor's degree on y-axis, bachelor's degree on x-axis. y-axis has scale 0 to 300 in increments of 50. x-axis has scale 0 to 80 in increments of 10. 0-5 is 2. 5-10 is 82. 10-15 is 291. 15-20 is 291. 20-25 is 140. 25-30 is 82. 30-35 is 49. 35-40 is 26. 40-45 is 13. 45-50 is 10. 50-55 is 7. 55-60 is 5. 60-65 is 2. (a) Let's refer to the County-level Data on education. The mean of these data values is approximately 20% and the standard deviation is approximately 10%. How many data values are between 10% per and 30%? In other words, how many data values are within 1 standard deviation (10%) from the mean (20%)? I don't know