The manufacturer of a generic medication claims the drug has as much active ingredient as the best-selling name brand, a mean of
175 mg per tablet. A consumer research group had a random
sample of the generic drug tested. The results are shown below.
Find the mean and standard deviation of the sample.
Active Ingredients per Tablet (mg)
166 173 183 171 162
163 177 184 183 171
166 178 181 167 179
179 172 189 172 180
177 186 168 162 171
168 166 171 187 186

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed