Calculating Mean Using Short Method

This video tutorial explains how to calculate the mean using the short method. It covers the formula, the concept of deviation, and the steps to find the assumed mean. The tutorial also demonstrates how to calculate f x dash by multiplying deviations with frequencies, summing them, and using the formula to find the mean. The video concludes with a review of the steps and a homework assignment.

What is the formula for calculating the mean using the short method?

• Mean = AM - (Σf * x') / n * i

• Mean = AM + (Σf * x') / n * i

• Mean = AM * (Σf * x') / n * i

• Mean = AM / (Σf * x') / n * i

In the formula for the short method, what does 'AM' stand for?

• Average Mean

• Approximate Mean

• Assumed Mean

• Actual Mean

How do you determine the assumed mean from a data set?

• Choose the class interval with the smallest range

• Choose the class interval with the highest frequency and almost in the middle

• Choose any class interval randomly

• Choose the class interval with the lowest frequency

What is the deviation in the context of the short method?

• The difference between the mean and the scores

• The size of the class interval

• The sum of all frequencies

• The midpoint of the class interval

How do you calculate the product f * x'?

• Multiply the deviation by the class interval

• Multiply the deviation by the frequency

• Multiply the frequency by the class interval

• Multiply the assumed mean by the frequency

What is the next step after calculating all f * x' products?

• Multiply them by the assumed mean

• Divide them by the number of class intervals

• Subtract them from the total frequency

• Add them together considering their signs

What is the size of the class interval in this example?

• 20

• 5

• 10

• 15

What is the final step in calculating the mean using the short method?

• Subtract the assumed mean from the calculated value

• Add the calculated value to the assumed mean

• Multiply the calculated value by the assumed mean

• Divide the calculated value by the assumed mean

What is the calculated mean in this example?

• 31.0

• 62.0

• 49.7

• 44.5

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