Plot a shows the number of hours ten girls watch television over one week. Poppy's is the Plot b shows the number of hours ten boys watch television over the same period of time. Which statement correctly compares the measures of center in the two sets of data plot a shows the

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?