Assembly times for components must be understood in order to “level” the stages of a production process. Construct both a histogram and a frequency polygon for the following assembly time data and comment on the key characteristics of the distribution.

Class Interval ......Frequency

30–under 32 ....... 5

32–under 34 ......... 7

34–under 36 ........15

36–under 38 .......21

38–under 40 ........34

40–under 42 ........24

42–under 44 ........17

44–under 46 ........ 8