Statistics Mean of Grouped Data Assumed Mean Method

The video tutorial explains how to find the median of grouped data. It begins with an introduction to grouped data and the concept of median as a measure of central tendency. The tutorial then discusses class intervals and cumulative frequency, emphasizing the importance of organizing data into tables. It provides a step-by-step guide to calculating the median, including finding cumulative frequencies and identifying the median class. The tutorial concludes with a summary of the steps involved in the process.

What is the primary characteristic of grouped data?

• Data is organized into groups or classes.

• Data is organized into individual values.

• Data is not organized at all.

• Data is organized alphabetically.

What is the first step in organizing data into a table?

• List the data in ascending order.

• List the data in descending order.

• List the data alphabetically.

• List the data in random order.

What does the frequency in a data table represent?

• The sum of all data points.

• The average of the data points.

• The rate at which something occurs.

• The total number of data points.

How is cumulative frequency calculated?

• By dividing the total frequency by the number of classes.

• By multiplying all frequencies together.

• By adding the frequencies of all classes.

• By subtracting the smallest frequency from the largest.

What is the median class interval?

• The class interval with the median value.

• The class interval where the cumulative frequency is just greater than n/2.

• The class interval with the lowest frequency.

• The class interval with the highest frequency.

What is the formula used to calculate the median of grouped data?

• l + (n/2 - cf) / f * h

• l - (n/2 - cf) / f * h

• l + (n/2 + cf) / f * h

• l * (n/2 - cf) / f * h

What is the median daily expense calculated in the example?

• Rupees 178

• Rupees 300

• Rupees 243.75

• Rupees 200