Use the following histogram generated by statistical software, which represents the battery life (in hours) of a sample of smartphones. (The values on the horizontal scale are rounded.)

What is the approximate number of smartphones represented in the three bars farthest to the right?

Use the following histogram generated by statistical software, which represents the battery life (in hours) of a sample of smartphones. Provide the estimated class width, along with the lower- and upper-class limits of the fourth bar from the left in the histogram.

Class boundaries are used to ensure that adjacent bars in a histogram do not touch. Decide whether the preceding statement is true or false. If it is false, rewrite it correctly.

In a health study, the resting pulse rates (beats per minute) of a group of adult males were recorded. The recorded pulse rates are given below:

62, 70, 72, 80, 74, 66, 78, 84, 88, 92, 70, 78, 66, 72, 80

(a) Construct a dot plot for the given data.

(b) Is there a pulse rate that appears to be an outlier? What is the outlier’s value?