2025 – S1 – IOP2601 – ASSESSMENT 1 – Q&A
QUIZ
Assessment 1
Started on Friday, 14 March 2025
State Finished
Completed Friday, 14 March 2025,
on
Time taken
Grade 30.00 out of 30.00 (100.00%)
Question 1
The range for the dataset of 8, 3, 8, 7, 2, 7, 2, 7, 5, 6 is _______.
A.
2
B.
6
C.
8
D.
7
Feedback
😊
Go through Lesson 3 in the prescribed book by Tredoux and Durrheim (2019). Also
refer to page 54 of the study guide, Lesson 6.
The correct answer is: 6
Question 2
The standard deviation of a set of data can never be a negative number. Is this
statement true or false?
A.
False.
B.
1
,2025 – S1 – IOP2601 – ASSESSMENT 1 – Q&A
True.
Feedback
😊
The standard deviation can never be a negative value. If you have obtained a
negative answer, you have definitely made a mistake. Refer to the hint on page 59 of
the study guide, Lesson 6.
The correct answer is: True.
Question 3
Unimodal distributions have two modes, while bimodal distributions have only one
mode. Is this statement true or false?
A.
True.
B.
False.
Feedback
😊
Unimodal distributions have only one mode, while bimodal distributions have two
modes. Go through Tutorial 3 of Tredoux and Durrheim (2019). Also refer to
your study guide, Lesson 5, page 50.
The correct answer is: False.
Question 4
The slope of a non-linear graph is always _____.
A.
negative
B.
positive
C.
constant
2
,2025 – S1 – IOP2601 – ASSESSMENT 1 – Q&A
D.
not constant
Feedback
😊
Refer to tutorial 24 of Tredoux and Durrheim (2019), and Lesson 3
The correct answer is: not constant
Question 5
We quantify information when we translate data into______.
A.
words
B.
numbers
C.
variables
D.
questions
Feedback
😊
This is explained on page 9 of the study guide, Lesson 2
The correct answer is: numbers
Question 6
Use the data sets below to answer the question that follows.
X: 7 9 8 7 6 8 1 6 9 8 Y: 1 2 2 3 1 2 4 5 4 5
What is the mean of X (𝑋̅ )?
A.
6,9
B.
14
3
, 2025 – S1 – IOP2601 – ASSESSMENT 1 – Q&A
C.
69
D.
7,5
Feedback
Answer: The mean of X is:
= Σx /n
= 69/10
= 𝟔,𝟗
See study guide from page 44, Lesson 5.
Answer: The mean of X is:
= Σx /n
= 69/10
= 𝟔,𝟗
See study guide from page 44, Lesson 5.
The correct answer is: 6,9
Question 7
The systematic process of research only involves data collection and data analysis.
Is this statement true or false?
A.
False
B.
True.
Feedback
well done
4
QUIZ
Assessment 1
Started on Friday, 14 March 2025
State Finished
Completed Friday, 14 March 2025,
on
Time taken
Grade 30.00 out of 30.00 (100.00%)
Question 1
The range for the dataset of 8, 3, 8, 7, 2, 7, 2, 7, 5, 6 is _______.
A.
2
B.
6
C.
8
D.
7
Feedback
😊
Go through Lesson 3 in the prescribed book by Tredoux and Durrheim (2019). Also
refer to page 54 of the study guide, Lesson 6.
The correct answer is: 6
Question 2
The standard deviation of a set of data can never be a negative number. Is this
statement true or false?
A.
False.
B.
1
,2025 – S1 – IOP2601 – ASSESSMENT 1 – Q&A
True.
Feedback
😊
The standard deviation can never be a negative value. If you have obtained a
negative answer, you have definitely made a mistake. Refer to the hint on page 59 of
the study guide, Lesson 6.
The correct answer is: True.
Question 3
Unimodal distributions have two modes, while bimodal distributions have only one
mode. Is this statement true or false?
A.
True.
B.
False.
Feedback
😊
Unimodal distributions have only one mode, while bimodal distributions have two
modes. Go through Tutorial 3 of Tredoux and Durrheim (2019). Also refer to
your study guide, Lesson 5, page 50.
The correct answer is: False.
Question 4
The slope of a non-linear graph is always _____.
A.
negative
B.
positive
C.
constant
2
,2025 – S1 – IOP2601 – ASSESSMENT 1 – Q&A
D.
not constant
Feedback
😊
Refer to tutorial 24 of Tredoux and Durrheim (2019), and Lesson 3
The correct answer is: not constant
Question 5
We quantify information when we translate data into______.
A.
words
B.
numbers
C.
variables
D.
questions
Feedback
😊
This is explained on page 9 of the study guide, Lesson 2
The correct answer is: numbers
Question 6
Use the data sets below to answer the question that follows.
X: 7 9 8 7 6 8 1 6 9 8 Y: 1 2 2 3 1 2 4 5 4 5
What is the mean of X (𝑋̅ )?
A.
6,9
B.
14
3
, 2025 – S1 – IOP2601 – ASSESSMENT 1 – Q&A
C.
69
D.
7,5
Feedback
Answer: The mean of X is:
= Σx /n
= 69/10
= 𝟔,𝟗
See study guide from page 44, Lesson 5.
Answer: The mean of X is:
= Σx /n
= 69/10
= 𝟔,𝟗
See study guide from page 44, Lesson 5.
The correct answer is: 6,9
Question 7
The systematic process of research only involves data collection and data analysis.
Is this statement true or false?
A.
False
B.
True.
Feedback
well done
4
