I am new to this field and subject. Please provide detailed answers that can help me learn the subject better. Show the expression you are using, and the substitutions you are making to calculate an answer.

Q1. -The following table presents some international food and non-food retail outlets' retail revenue:

Rank	Outlet	Retail Revenue ($m)
1	Coles Meyer	26737
2	Woolworths	24985
3	Foodland	4905
4	West-farmers	3100
5	David Jones	1725
6	Retravision	1290
7	Harvey Norman	1160
8	Millers Retail	972
9	Mitre 10	890
10	7-Eleven	747

1. Compute the mean, median, range, variance, and standard deviation for these sample data.
2. Discuss which of these three measures of variability (range, variance, and standard deviation) you would prefer to use as a measure of variation.
3. Comment on the skewness of this sample data.
4. Compute the mean and median after eliminating Coles Meyer and Woolworths from the data. How are the mean and median affected by these changes?

Q2. A sample of 300 adults is selected. The contingency table below shows their registration status and their preferred source of information on current events.

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