Bivariate Data

New Zealand

Level 6 - NCEA Level 1

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

b

Which gender had the largest range?

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

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.

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Plan and conduct investigations using the statistical enquiry cycle: A justifying the variables and measures used B managing sources of variation, including through the use of random sampling C identifying and communicating features in context (trends, relationships between variables, and differences within and between distributions), using multiple displays D making informal inferences about populations from sample data E justifying findings, using displays and measures.

Investigate a given multivariate data set using the statistical enquiry cycle

Investigate bivariate numerical data using the statistical enquiry cycle