Is any one can help me with those questions?

2.2 In Exercises 5–8, identify the class width, class midpoints, and class boundaries for the

given frequency distribution.

5.

Critical Thinking. In Exercises 9–12, answer the given questions that relate to

Exercises 5–8.

9. Identifying the Distribution Does the frequency distribution given in Exercise 5

appear to have a normal distribution, as required for several methods of statistics

introduced later in this book?

In Exercises 13 and 14, construct the relative frequency distribution that corresponds to

the frequency distribution in the exercise indicated.

13. Exercise 5

In Exercises 15 and 16, construct the cumulative frequency distribution that corresponds

to the frequency distribution in the exercise indicated.

15. Exercise 5

20. 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?

2.3

12. Nicotine in Cigarettes Refer to Exercise 20 in Section 2-2 and use the frequency distribution

to construct a histogram. Do the data appear to have a distribution that is approximately

normal?