1.

A random sample of five companies had the following sales revenues ($million):

6 2 5 4 3

Given that the mean of this data set is 4 ($million), which of the following is the standard deviation sales revenue for this sample (to 1 decimal place)?

A. $6.3 million

B. $1.6 million

C. $1.4 million

D. $2.5 million

2.

In an investigation into the weekly expenditure on food (WEF) by Australian households a random sample of 10 households was selected. The following table of numerical summary measures for this data was obtained via Excel.

Weekly Expenditure on Food ($) Mean 346.2 Median 360.5 Mode N/A Standard Deviation 51.9 Sample Variance 2689.51 Range 157 Minimum 254 Maximum 411 Count 10