Question

im bad at the graphs. please explain.

Cumulative Frequency Construct the cumulative frequency distribution for the given data Daily Low (°F) Frequency 35-39 40-44 45-49 50-54 55-59 60-64 65-69 Daily Low Temperature (°F) Less than 40 Less than 45 Less than 50 Less than 55 Less than 60 Less than 65 Less than 70 Construct the cumulative frequency distribution

Answer 1

Answer

we know that cumulative frequency for any given class interval is equal to the sum of all previous class interval frequencies and its own frequency

So, we can write

Cumulative frequency for 40 = previous class frequency + current class frequency

= 0+1

= 1

Cumulative frequency for 45 = previous class frequency + current class frequency

= 1+4

= 5

Cumulative frequency for 50 = previous class frequency + current class frequency

= 5+6

= 11

Cumulative frequency for 55 = previous class frequency + current class frequency

= 11+14

= 25

Cumulative frequency for 60 = previous class frequency + current class frequency

= 25+9

= 34

Cumulative frequency for 65 = previous class frequency + current class frequency

= 34 + 6

= 40

Cumulative frequency for 70 = previous class frequency + current class frequency

= 40+1

= 41