# QNT 275 Final Exam 2017 – Cumulative Frequency Distribution of Commuting Time

**The following table gives the cumulative frequency distribution of the commuting time (in minutes) from home to work for a sample of 400 persons selected from a city.**

**Time (minutes) f**** **

**0 to less than 10 64****0 to less than 20 153****0 to less than 30 217****0 to less than 40 283****0 to less than 50 352****0 to less than 60 400**

** The sample size is:**

400

** The percentage of persons who commute for less than 30 minutes, rounded to two decimal places, is:**

Take the cumulative total values less than 30 minutes 217, then divide by 400. Multiply by 100 for the percentage.

54.25%

** The cumulative relative frequency of the fourth class, rounded to four decimal places, is:**

The cumulative relative frequency is the same as the previous question, but stays a decimal. For the forth group it is 283/400.

0.7075

** The percentage of persons who commute for 40 or more minutes, rounded to two decimal places, is:**

Subtract 283 from 400, then divide by 400.

29.25%

** The percentage of persons who commute for less than 50 minutes, rounded to two decimal places, is:**

Divide 352 by 400.

88.00%

** The number of persons who commute for 20 or more minutes is:**

(400-217) /400

45.75%

**Student:**Lonny McDowell**Textbook:**QNT 275 Statistics Fundamentals**Course:**QNT 275 Final Exam 2017

### Access Tons More QNT 275 Study Material

The fun doesn't stop here. Make sure to check out our latest content on QNT 275 and statistics.