Statistics: Calculating the Mean

The video tutorial explains how to calculate the mean number of finishers in the New York Marathon over four decades. It breaks down the problem into manageable steps, including adding totals for each decade, calculating the overall total, and finding the mean. The tutorial concludes with rounding the mean to the nearest hundred, emphasizing the importance of showing the method for full marks.

What is the duration of a decade?

• 20 years

• 15 years

• 10 years

• 5 years

What is the main task in calculating the mean number of marathon finishers?

• Finding the median

• Calculating the total number of finishers

• Identifying the mode

• Determining the range

Which two decades are combined first in the addition process?

• Third and fourth

• Second and third

• First and second

• First and fourth

What is the total number of finishers for the third and fourth decades?

• 170,932

• 829,039

• 633,244

• 195,795

What is the total number of finishers for the first and second decades?

• 170,932

• 829,039

• 633,244

• 195,795

What is the final total number of marathon finishers across all four decades?

• 829,039

• 170,932

• 633,244

• 195,795

How many decades are considered when calculating the mean?

• Two

• Three

• Four

• Five

What is the result of dividing the total number of finishers by the number of decades?

• 207,500

• 207,300

• 207,259

• 207,700

To what value is the mean number of finishers rounded?

• 207,300

• 207,500

• 207,200

• 207,400

What is the final rounded mean number of marathon finishers?

• 200,7200

• 200,7500

• 200,7300

• 200,7400