Question

from the grouped frequency distribution, determine the total number of data.
class intervals frequency
1-5 51
6-10 28
11-15 46
16-20 18
21-25 33
26-30 8
there are □ data.

Explanation:

Step1: Sum all frequencies

To find the total number of data, we sum the frequencies of all class intervals. The frequencies are 51, 28, 46, 18, 33, and 8.
$$51 + 28 + 46 + 18 + 33 + 8$$

Step2: Calculate the sum

First, add 51 and 28: $51 + 28 = 79$.
Then add 46: $79 + 46 = 125$.
Next add 18: $125 + 18 = 143$.
Then add 33: $143 + 33 = 176$.
Finally add 8: $176 + 8 = 184$.

Answer:

184