You have been given a sample data set related to sales revenue and advertising expenditure in Dian packaging.

Sales Revenue ($ 000)	Advertising expenditure ($ 000)
35	7
37	8
45	10
47	12
51	12
55	11
60	15
72	16
75	18
74	20

Use the above data to answer the questions given below;

*Calculate mean of sales revenue and advertising expenditure

*Calculate Standard deviation of sales revenue and adverting expenditure

*Calculate correlation coefficient between above two variables and interpret the meaning