Which of the following is the most important and commonly used graphical presentation of numerical (quantitative) data?

Select one:

a.

A bar chart

b.

A scatter plot

c.

A pie chart

d.

A histogram

Which of the following summary measures cannot be easily approximated from a box-and-whisker plot?

Select one:

a.

The median.

b.

The range.

c.

The variance.

d.

The interquartile range.

Which of the following summary measures is affected by extreme values?

Select one:

a.

The mean.

b.

The range.

c.

The median.

d.

Both A and B.

Which of the following statements is true?

Select one:

a.

In a symmetrical distribution the mean, median and mode are equal

b.

None of these choices are correct.

c.

The median cannot be determined graphically

d.

The shortest rectangle in a histogram represents the modal class of the distribution.

Which of the following is not a measure of variability?

Select one:

a.

The coefficient of variation

b.

The standard deviation

c.

The covariance

d.

The range

Which of the following is the best type of chart for illustrating the Inflation rate of Australia from 1970 to 2018?

Select one:

a.

A pie chart

b.

A histogram

c.

A time-series chart

d.

A bar chart