Question

the number of fish in various tanks in a pet store are: 8,12,15,18,18,20,24,26,28,33,35,54. put this data into the frequency table below. no. of fish | frequency 1 - 10 | 1 11 - 20 |? 21 - 30 | 3 31 - 40 | 2 41 - 50 | 51 - 60 |

Explanation:

Step1: Count for 11 - 20

Count numbers in 11 - 20 range.
12, 15, 18, 18, 20 are 5 numbers.

Step2: Count for 41 - 50

Check for numbers in 41 - 50 range.
No such numbers, so frequency is 0.

Step3: Count for 51 - 60

Check for numbers in 51 - 60 range.
54 is 1 number, so frequency is 1.

Answer:

11 - 20 frequency: 5
41 - 50 frequency: 0
51 - 60 frequency: 1