Mean, Mode, Median HBL CT task

Computational Thinking Task

Sec 4E5N HBL
Mean, Mode, Median

Fill in the Blanks

You have learned that mean, mode and median are different ways of obtaining an

value for a set of data.

In this activity, you will be exploring several flowcharts that will help you recap some main concepts on Mean, mode and median, including how and when to find them.

Multiple Choice

Section A: Mean

When we intend to calculate the mean of a data set, we first need to determine if the data is ungrouped or grouped.

Study the partially completed flowchart. What does n represent?

• sum of values in the data set

• number of values in the data set

• sum of the scores in the data set

• number of groups in the data set

Multiple Choice

Section A: Mean

In the partially completed flowchart shown, what should be written in the box labelled 'A'?

• Have you calculated Σx?

• Have you calculated x?

• Have you calculated Σf?

• Have you calculated f?

Multiple Choice

Section A: Mean

In the partially completed flowchart shown, what is the mid-value, x?

• The class interval at the middle of the data set

• The middle position of the data set

• The data value at the middle position of the data set

• The data value in the middle of a class interval

Multiple Choice

Section A: Mean

In the partially completed flowchart shown, what should be written in the box labelled 'B'?

• Have you calculated fx?

• Have you calculated x?

• Have you calculated Σf?

• Have you calculated Σfx?

Fill in the Blanks

Section A: Mean

The completed flowchart for finding the mean of a data set is shown on this slide for your reference. When you are ready to move on to the next slide, type "go" in the blank below.

Multiple Choice

Section B: Median

The mean is a very useful way of expressing the average of a set of data. However, it does have some limitations. For example, if there are ___________, it cause the mean to give a less accurate indication of the average of the data set.

In these cases, the median is often a good alternative for obtaining an average value.

• very large values

• extreme values

• very small values

• too many values

Multiple Choice

Section B: Median

The incomplete flowchart shown is for finding the median of a set of data. What should be written in the box labelled "C"?

• Has the minimum value of the data set been identified?

• Have the data values been arranged in ascending order?

• Has the sum of the data set been identified?

• Has the maximum value of the data set been identified?

Multiple Choice

Section B: Median

In the incomplete flowchart shown, what should be written in the box labelled "D"?

• Has the middle position been determined?

• Has the sum of the data set been identified?

• Has the range of the data set been found?

• Has the frequency of each data value been found?

Multiple Choice

Section B: Median

In the incomplete flowchart shown, what should be written in the box labelled "E"?

• Median = Data value just before middle position

• Median = Data value just after middle position

• Median = Data values before and after middle position

• Median = Mean of the two values identified

Fill in the Blanks

Section B: Median

The completed flowchart for finding the median of a data set is shown on this slide for your reference. When you are ready to move on to the next slide, type "go" in the blank below.

Fill in the Blanks

Section C: Mode

The third way of expressing the average of a data set is known as the mode.

The completed flowchart for finding the mode of a data set is shown on this slide for your reference. When you are ready to move on to the next slide, type "go" in the blank below.