The Santiago family shares a family cell phone plan. The plan is for​ 3,900 text messages each month. The mother has used​ 1,400 messages. The father has used at least 700 messages. The three children have used 550 messages each. Write an inequality to show the number of messages the Santiago family has used. Explain.

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