# Create and Interpret Parallel Dot Plots

## Interactive practice questions

A class completed $40$40 questions for homework.

The time needed for boys and girls to finish them was collected, and the data was presented as a parallel dot plot.

a

Comparing boys and girls, which gender had the highest median time?

Girls

A

Both medians are the same.

B

Boys

C

Girls

A

Both medians are the same.

B

Boys

C
b

Which gender had the largest range?

Boys

A

Girls

B

Both ranges are the same.

C

Boys

A

Girls

B

Both ranges are the same.

C
c

Which group has the highest valued mode?

Boys

A

Girls

B

Both modes are the same.

C

Boys

A

Girls

B

Both modes are the same.

C
Easy
Approx 2 minutes

David and Eamon were taking part in a spelling bee. The parallel dot plot shows how many letters were in each word that each boy correctly spelt.

Isabelle did an experiment to see how well plants grow in different conditions.

She had $8$8 plants grow in the sunshine, and $8$8 that grew in the shade. She measured how tall they grew in centimetres after $2$2 months, and recorded the information as a parallel dot plot.

20 people joined a group fitness class, and over two weeks, they were tested on the number of chin ups they can do.

The dot plots show the number of chin ups each person could do.

### Outcomes

#### S5-1

Plan and conduct surveys and experiments using the statistical enquiry cycle:– determining appropriate variables and measures;– considering sources of variation;– gathering and cleaning data;– using multiple displays, and re-categorising data to find patterns, variations, relationships, and trends in multivariate data sets;– comparing sample distributions visually, using measures of centre, spread, and proportion;– presenting a report of findings

#### S5-2

Evaluate statistical investigations or probability activities undertaken by others, including data collection methods, choice of measures, and validity of findings