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# HI6007 Group Assignment

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## Question:

Below you are given the examination scores of 20 students (data set also provided in accompanying MS Excel file).

Construct a frequency distribution, cumulative frequency distribution, relative frequency distribution, cumulative relative frequency distribution and percent frequency distribution for the data set using a class width of 10. (5 marks)

Construct a histogram showing the percent frequency distribution of the examination scores. Comment on the shape of the distribution.

What is the estimated regression equation? Show the regression output.

1. Determine whether the model is significant overall. Use α = 0.10.
2. Determine if competitor’s price and advertising is individually significantly related to sales. Use α = 0.10.

Based on your answer to part (c), drop any insignificant independent variable(s) and re-estimate the model. What is the new estimated regression equation?  Interpret the slope coefficient(s) of the model from part (d).

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