STA108 WEEK 4
23 - 29 OCTOBER 2023
Kuliah 1: 30 Mac - 24 May 2026
23 - 29 OCTOBER 2023
CHAPTER 2: DESCRIPTIVE STATISTICS
Topics:
UNGROUPED DATA
Measures of Central Tendency
Measures of Central Position
Measures of Dispersion
Video 1: Measures of Central Tendency (Mean, Median, Mode)
LEARNING OBJECTIVE 1:
Measures of Central Tendency (Mean, Median, Mode)
Students need to know how to calculate mean, median, mode for ungrouped data using function in scientific calculator.
👉🏼 Refer Video 1 above.
👉🏼 Refer Pg.55 (formula and steps to calculate mean, median and mode)
👉🏼 Refer Pg.62 - 63 (steps how to use scientific calculator)
👉🏼 Do Example Pg.64 (as explained in the video)
👉🏼 Do Example 21 Pg.56
👉🏼 Do Exercise 1(a) Pg.67
Answer:
Mean = 224.8 (The average weekly sales of the company is RM 224 800)
Median = 223 (Half of the weekly sales of the company is more than RM223 000)
Mode = 222 (Most of the weekly sales of the company is RM222 000)
Video 2: Measures of Dispersion (Variance and Standard Deviation)
LEARNING OBJECTIVE 2:
Measures of Dispersion (Variance and Standard Deviation)
Students need to know how to calculate measures of dispersion (standard deviation and variance) for ungrouped data using function in scientific calculator.
👉🏼 Refer Video 2 above.
👉🏼 Refer Pg.57 (formula).
👉🏼 Refer Pg.62 - 63 (steps how to use scientific calculator).
👉🏼 Do Example 22 Pg.57
Answer:
Variance = 7015.4667
Standard Deviation = 83.7584
👉🏼 Do Exercise 1(b) Pg.68
Answer:
Variance = 24.8444
Standard Deviation = 4.9844
Video 3: Measures of Central Position (First, Second and Third Quartile)
LEARNING OBJECTIVE 3:
Measures of Central Position (First, Second and Third Quartile)
Students need to know how to calculate measures of central position (first, second and third quartiles) and for ungrouped data.
👉🏼 Refer Video 3 above.
👉🏼 Refer Pg.60 (formula and steps to calculate first, second and third quartiles).
👉🏼 Do Example 23 Pg.61
Answer:
Q1 = 27.75
Q2 = 36
Q3 = 40.75
IQR = 13
QD = 6.5
👉🏼 Do Exercise 1(d), (e) Pg.68
Answer:
Q1 = 222 (75% of weekly sales of the company is more than RM 222 000)
Q3 = 228 (25% of weekly sales of the company is more than RM 228 000)
IQR = 6
QD = 3
Video V4W4
Extra Video
Mean, Median, Mode, Range & Standard Deviation
Dear students, you may watch Video V4W4 for more understanding.