Page 1 of 4 Business Statistic and Data-Driven Decision Making Main Assignment (Class 13A) Assignment Due Date: 29 March 2023, 2359 hours Wei

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Business Statistic and Data-Driven Decision Making

Main Assignment (Class 13A)

Assignment Due Date: 29 March 2023, 2359 hours

Weight: 100%

Assignment Instruction

• Write your full name (according to register), Student Number (CTxxxx) and class

clearly on the first page of the assignment.

• Your assignment should be type-written. You are allowed to insert your

mathematical workings as images, if require.

• Page format should follow the APA style: line spacing=1.5, font=Arial, font

size=12 and left justified.

• Include at least 8 credible resources in your Reference Page, using APA

Referencing format.

• Submit your assignment in a single MS Word document via the LMS before the

due date.

Full Name: ________________________

Student ID: ________________________

Page 2 of 4

Question 1 (25 marks)

Conduct a market survey on the price of a product (e.g., mobile phone, running

shoe, jean, potato chips, etc.) that you are interested in. You are required to collect

at least 6 records as follows:

No. Brand Model / Description Price (S$) Source / URL

1

2

3

4

5

6

(4 marks)

Calculate

a) the mean, the median and the mode.
(5 marks)

b) the standard deviation.
(6 marks)

c) the coefficient of variation.
(3 marks)

d) the quartiles and interquartile range
(7 marks)

Page 3 of 4

Question 2 (25 marks)

a) The marketing manager wants to analyse the preference on action movie for his

customers. The following table shows a summary:

Preference

Yes No Total

Gender
Male 80 20 100

Female 30 70 100

Total 110 90 200

Find the probability that a randomly selected customer who:

i. likes action movie

ii. is male and like action movie

iii. is female or like action movie

(12 marks)

b) The salary of a sales manager is normally distributed with a mean of $3500 and

standard deviation of $420.

i. Find the probability that a randomly selected manager has a salary that is

between $3,000 and $4,200?

ii. If 20 managers are randomly selected, what is the probability that their
average salary exceeds $3,750?
(13 marks)

Page 1 of 4 Business Statistic and Data-Driven Decision Making Main Assignment (Class 13A) Assignment Due Date: 29 March 2023, 2359 hours Weight: 100% Assignment Instruction • Write your full name (according to register), Student Number (CTxxxx) and class clearly on the first page of the assignment. • Your assignment should be type-written. You are allowed to insert your mathematical workings as images, if require. • Page format should follow the APA style: line spacing=1.5, font=Arial, font size=12 and left justified. • Include at least 8 credible resources in your Reference Page, using APA Referencing format. • Submit your assignment in a single MS Word document via the LMS before the due date. Full Name: ________________________ Student ID: ________________________ Page 2 of 4 Question 1 (25 marks) Conduct a market survey on the price of a product (e.g., mobile phone, running shoe, jean, potato chips, etc.) that you are interested in. You are required to collect at least 6 records as follows: No. Brand Model / Description Price (S$) Source / URL 1 2 3 4 5 6 (4 marks) Calculate a) the mean, the median and the mode. (5 marks) b) the standard deviation. (6 marks) c) the coefficient of variation. (3 marks) d) the quartiles and interquartile range (7 marks) Page 3 of 4 Question 2 (25 marks) a) The marketing manager wants to analyse the preference on action movie for his customers. The following table shows a summary: Preference Yes No Total Gender Male 80 20 100 Female 30 70 100 Total 110 90 200 Find the probability that a randomly selected customer who: i. likes action movie ii. is male and like action movie iii. is female or like action movie (12 marks) b) The salary of a sales manager is normally distributed with a mean of $3500 and standard deviation of $420. i. Find the probability that a randomly selected manager has a salary that is between $3,000 and $4,200? ii. If 20 managers are randomly selected, what is the probability that their average salary exceeds $3,750? (13 marks)

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