Question

Thirty-two people were chosen at random from employees of a large company. Their commute times (in hours)were recorded in a table (shown on the right).0.5 0.8 1.2 0.4 0.7 1.3 1.0 0.70.6 1.3 0.9 1.0 0.8 0.2 0.4 1.10.8 1.1 0.7 0.2 0.6 1.0 0.7 1.40.4 1.2 0.7 0.6 1.1 0.9 0.4 0.8Construct a frequency table using a class interval width of 0.2 starting at 0.15.FrequencyClass Interval0.15-0.35Enter your answer in the answer box and then click Check Answer.partsremainingClear AllCheck Answer

Answer 1

We are asked to construct a frequency table using a class interval width of 0.2 starting at 0.15.

The greatest value in the table is 1.4

So, the class intervals are

0.15 - 0.35

0.35 - 0.55

0.55 - 0.75

0.75 - 0.95

0.95 - 1.15

1.15 - 1.35

1.35 - 1.40

Now we have to count the values that fall between each of the class intervals.

This will be the frequency.

0.15 - 0.35 | 2

0.35 - 0.55 | 5

0.55 - 0.75 | 8

0.75 - 0.95 | 6

0.95 - 1.15 | 6

1.15 - 1.35 | 4

1.35 - 1.40 | 1

If you count the frequency, it should sum to 32

2+5+8+6+6+4+1 = 32

Hence, the frequency table is correct.