The following data give the repair costs (in dollars) for 30 cars randomly selected from a list of cars that were involved in collisions.
2300 750 2500 410 555 1576
2460 1795 2108 897 989 1866
2105 335 1344 1159 1236 1395
6108 4995 5891 2309 3950 3950
6655 4900 1320 2901 1925 6896
a. Construct a frequency distribution table. Take $1 as the lower limit of the first class and $1400 as the width of each class.
b. Compute the relative frequencies and percentages for all classes.
c. Draw a histogram and a polygon for the relative frequency distribution.
d. What are the class boundaries and the width of the fourth class?