Nicotine in Cigarettes Refer to Data Set 3 in Appendix B and

Nicotine in Cigarettes Refer to Data Set 3 in Appendix B and use the
29 measured amounts of nicotine.Construct a frequency distribution
with 8 classes beginning with a lower class limit of 0.0,and use a class
width of 0.2.Describe the nature of the distribution.Does the frequency
distribution appear to be roughly a normal distribution,as described in
this section?
主要那个频率不会算 怎么算的