QUESTION 4
Mr. Ali runs a gift shop in the Defense area, Karachi. He
advertises weekly in the local newspapers and is considering
increasing his advertising budget. Before doing so, he decides to
evaluate the past effectiveness of these advertisements. Five weeks
are sampled, and the advertising expenses (in PKR) and sales volume
for each is shown in the table given below:
Sales (PKR 100k)
6
8
6
10
6
Advertising (PKR 100k)
4.1
6.72
5.05
7.26
2.69
If the company wants to increase sales by 1200k, then the advertising
expense required will be _______ k.
QUESTION 5
Mr. Ali runs a gift shop in the Defense area, Karachi. He
advertises weekly in the local newspapers and is considering
increasing his advertising budget. Before doing so, he decides to
evaluate the past effectiveness of these advertisements. Five weeks
are sampled, and the advertising expenses (in PKR) and sales volume
for each is shown in the table given below:
Sales (PKR 100k)
6
8
6
10
6
Advertising (PKR 100k)
4.1
6.72
5.05
7.26
2.69
Calculate the coefficient of correlation
and in the light of the value of the coefficient of correlation, which
statement is true. (write only the number of the correct option in the answer
box)
There is a strong direct
relationship between the two study variables
There is a strong inverse
relationship between the two study variables
There is a weak direct
relationship between the two study variables
There is a weak inverse
relationship between the two study variables
QUESTION 6
Mr. Ali runs a gift shop in the Defense area, Karachi. He
advertises weekly in the local newspapers and is considering
increasing his advertising budget. Before doing so, he decides to
evaluate the past effectiveness of these advertisements. Five weeks
are sampled, and the advertising expenses (in PKR) and sales volume
for each is shown in the table given below:
Sales (PKR 100k)
6
8
6
10
6
Advertising (PKR 100k)
4.1
6.72
5.05
7.26
2.69
In the simple linear regression model (Ycap = a + bx), there are
two parameters called the constant (a) and the coefficient of
the independent variable (b). Find the value of the coefficient of
the independent variable (b) using the given data.