help with statistics homework

Statistics
Tutor: None Selected Time limit: 1 Day

BI-LO appliance super store has oulets in several metropolitian area in new England the general sales manager aired a commercial for a digital camera on local tv stations prior to a sale starting on Sat.and ending Sun. she obtained the information for Sat.-Sun digital camera sale at various oulets and paired it with the # of times the advertismentwas shown on tv the purpose is to find whether there is a relationship between the # of times the advertisement was aired and digital camers sales

May 9th, 2015

To know if there is a relationship between the # of times the advertisement was aired and digital camers sales, you have to plot the 5 pairings on a graph for example with digital camers sales on the y axis and the number of times the advertisement was aired on the x axis. 

You can see the graph on the excel file attached :

3.xlsx 

You can notice that the pairings draw almost a straight line (shown also on the graph). We can say that there's a linear and positive relationship between the 2 different parameters. Positive because when you increase advertisement, you increase sales. 

Thank you in advance for giving me a nice feedback. 


May 9th, 2015

how do I determine the correlation coefficient?

May 9th, 2015

I'm going to anwer to this question

May 9th, 2015

You can take a look on this :

4.jpg 

The correlation coefficient is near 1, so there's a very good correlation

May 9th, 2015

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