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50 psychology students took a standardized test. The scores are summarized in the GFDT below. Scores Frequency 8 140 - 159 16
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Answer #1
Scores Frequency Relative Frequency=f/Sumf
140-159 8 0.16
160-179 7 0.14
180-199 12 0.24
200-219 8 0.16
220-239 15 0.3
Total 50 1

Hence relative frequency for class 180-199 is 0.24

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Answer #2

Data was collected for 300 fish from the North Atlantic. The length of the fish (in mm) is summarized in the GFDT below.

  Lengths (mm)     Frequency   
140 - 1491
150 - 15916
160 - 16971
170 - 179108
180 - 18983
190 - 19918
200 - 2093



What is the lower class limit for the second class?

lower class limit = 


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