Jenny traveled to the recycling plant and back. It took one hour longer to go there than it did to come back. The average speed on the trip there was 64 km/h. The average speed on the way back was 80 km/h. How many hours did the trip there take? A) 4 hours B) 2 hours
C) 5 hours D) 3 hours

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