(Answered) : Question 5 20 Marks Shop Owner Wanted Find Increasing Volume Music Played Peak Shopping H Q28382211

Question 5 [20 marks]
a. A shop owner wanted to find out if increasing the volume ofmusic played during
peak shopping hours influenced the sales volumes. After collectinga series of data
over a specific period and subsequent statistical analysis, it wasestablished that the
correlation coefficient of determinant (r2) was 0.80. What is yourinterpretation of the
relationship between the two variables? (8 marks)
b. An employer interviews students from University of Botswana (UB)and University
of South Africa (UNISA). She learns that the colleges are similarand that both grade
graduates on a 4.0 scale. The mean grade point average at UB is2.62 with standard
deviation (SD) of 0.50, whereas as the