Which intervals are most appropriate for constructing a frequency table for the data set?   45     53     60     36     22     27     47     68     33     51     55     29     28     45     43 a.) 20–39, 40–49, 50–59, 60–69 b.) 20–35, 35–50, 50–65, 65–80 c.) 20–34, 35–49, 50–64, 65–79 d.) 20–39, 40–54, 55–65, 66–75

There are a few criteria one can use for choosing intervals.

Selection B has boundaries that overlap, so can be ruled out immediately. Selection D has ranges that go from 19 to 9, so does not have very uniform intervals. Likewise, selection A defines the first interval to be twice the width of the others, so it isn't a good choice, either.

IMO, the best of the offered choices is ...

... C.) 20–34, 35–49, 50–64, 65–79

the balance is found at the link

step-by-step explanation:

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70