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0308F - Day 10 HW - Population vs Sample Mean and Standard Deviation 1) How do you calculate the standard deviation and mean of a sample as opposed to the standard deviation and mean of the population? 2) How do you use mean and standard deviation to compare sample data to population data? 3) Given the mean and the standard deviation, how do you draw a model normal distribution (bell curve) with standard deviations from the mean labled? 4) What percentage of the data will fall within one standard deviation of the mean? (68%) What percentage of the data will fall within two standard deviations of the mean? (95%) What percentage of the data will fall within three standard deviations of the mean? (99.7%) These percentages are the same as the probability of randomly selecting a value from these intervals. 5) How do you calculate the mean and standard deviation of a frequency table?