HEART RATE MEASUREMENTS The table below summarizes the resting heart rate (in beats per minute) of a group of individuals. Identify the class width, class midpoints, and class boundaries for the given frequency distribution. Also, determine the total number of individuals included in the summary.

A university health center recorded the resting heart rates (beats per minute, BPM) of 50 students during a wellness checkup. Construct a frequency distribution using a class width of 5 BPM, starting with a lower class limit of 55 BPM. Does the frequency distribution suggest a normal distribution?

In a statistics class, students are asked to graph the distribution of test scores. Which graph should they use to determine how many students scored below a certain value, and what is the main feature of this graph?

A survey records the number of books read by $28$ students during the summer: $2,7,5,9,12,6,4,10,8,3,15,11,13,14,5,7,8,6,12,9,10,4,3,2,1,13,14,15$. Construct a frequency distribution using $5$ classes. Include class midpoints, relative frequencies, and cumulative frequencies.

What is the most common cafeteria line wait time based on the relative frequency histogram?