A random sample of 30 customer records for a physician’s office showed the following times (in days)

required to collect insurance payments:

Number of Days to Collect Payment 34 55 36 39 36 32 35 30 47 31 60 66 48 43 33 24 37 38 65 35 22 45 33 29 41 38 35 28 56 56

a. Construct a stem and leaf diagram of these data.

b. Within what range of days are most payments collected?