Question

In: Statistics and Probability

You have been asked to engage in one final project concerning the sales of the Nikon...

You have been asked to engage in one final project concerning the sales of the Nikon D5 camera. This time you wish to study the nature of the relationship between sales of the camera body and sales of a certain lens that can be used with this body and other Nikon bodies. Specifically, you wish to study whether and to what extent if the sale of Nikon D5 camera bodies explains and predicts the sale of the lens. Data concerning these two variables of interest is collected over a one-year period from a representative sample of stores in the chain of stores that sell both the body and the lens. This data is shown in appendix one. The questions that need to be answered about the results you generate are also shown below.

       Sales of Body    Sales of Lens                        

                                                155 122

                                                101 120

                                                157 135

                                                180 95

                                                150 100

                                                201 174

                                                  99 118

                                                137 130

                                                155 128

                                                165 166

                                                152 131

                                                127 102

                                                217 165

                                                186 154

                                                176 97

                                                123 129

                                                109 98

                                                  90 105

                                                176 120

                                                129 105

a) Create a scatter diagram of this data. Before you proceed further, make some observations about the behavior of the data, if you are able, based solely upon this diagram. Do not plot the regression line on the scatter diagram.


b) Find the regression coefficients and the regression equation for this data by using the method of least squares analysis.

Solutions

Expert Solution

a) Scatter plot

This plot shows that as sales of body increases sales of lens is also increase at some instances.

b)

PL??

orchestra answered 2 years ago
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