In order to study whether IQ level is related to birth order, data were collected from a sample of 540 students on their birth order (Oldest/In Between/Youngest) and their score on an IQ test. The data collected in this study would be best displayed using:

which one:

(a) a pie chart

(b) a histogram

(c) a scatterplot

(d) a two-way table

(e) side-by-side boxplots

2 answers

If actual values given, a scatterplot. If just three categories of birth orders given, a histogram.
Scatterplot