DSC1630
Assignment 4
Semester 1 2024
DUE 23 April 2024
QUESTIONS WITH ANSWERS
, lOMoARcPSD|24668432
DSC1630/204/2
Dear student
I hope you are doing welland that you are enjoying this module. You have completed the four
assignments for the course andthatall is left to pass this module is the examination.
It is now
time to start your revision for the examination.
Try to work through all the assignments (first and
second semester), evaluation exercises and the previous examination paper when you prepa
examination. The questions in the upcoming examination paper are similar to the problems in
above mentioned. You are also welcome to try the first semester’s assignments.
The solutions are
available on myUnisa under Additionalresources.Remember, practice makes perfect!
The more
examples you work through the more you will be able to recognise a problem and know how
it. Please visit the Announcement tab on myUnisa as I regularly post some extra notes for y
convenience.An announcement on the examination as aswell
the solutions of one of the previous
examination papers, will be posted just before the exam.
You are also welcome to contact me by e-mail, fax, telephone or a personal appointment if y
help regarding the study material.
My contact details and contact hours are as follows:
Office:
E-mail:
1 Solution Summary
The following is a summary of the correct answers:
Q 1 Option 3 Q9 Option 4
Q 2 Option 2 Q 10 Option 1
Q 3 Option 5 Q 11 Option 4
Q 4 Option 1 Q 12 Option 1
Q 5 Option 4 Q 13 Option 3
Q 6 Option 4 Q 14 Option 1
Q 7 Option 2 Q 15 Option 4
Q 8 Option 3
2
, lOMoARcPSD|24668432
DSC1630/204/2
2 Assignment 04 – Detailed Solution
1. We need to determine the standard deviation of the number of Using
housesthe
sold.
statistical
keys of our calculator and entering the data points, we determine that the
x is:
value of s
sx = 6,60808 . . .
≈ 6,6.
The standard deviation is 6,6.
EL-738
Switch to STA mode with two varia-
bles
HP10BII
MODE 1 1
Clear allthe keys C ALL
Clear allthe memory keys P
2ndF M CLR 0 0 CL [on → M key]
Enter the data Enter the data P
5 (x,y) [nextto the ENT keys] 500 5 INPUT 500 P +
DATA [on the ENT key] 15 INPUT 900 P+
15 (x,y) 900 DATA 19 INPUT 1 500 P +
19 (x,y) 1 500 DATA 7 INPUT 2 000 +
7 (x,y) 2 000 DATA Calculate s
Calculate s sx , sy [on 8 key]
ALPHA s x = 6.60808. . . is displayed.
sx = 6.60808. . . is displayed.
CancelSTA mode:
MODE 0
[Option 3]
2. We need to determine the correlation coefficient
r of the fitted line that represents the data.
The correlation coefficient tells you how strong the linear relationship between the two
data is.
Using the statistical keys of our calculator and entering the data points we determine th
correlation coefficient is
r = 0,16428 . . .
≈ 0,16
3
Assignment 4
Semester 1 2024
DUE 23 April 2024
QUESTIONS WITH ANSWERS
, lOMoARcPSD|24668432
DSC1630/204/2
Dear student
I hope you are doing welland that you are enjoying this module. You have completed the four
assignments for the course andthatall is left to pass this module is the examination.
It is now
time to start your revision for the examination.
Try to work through all the assignments (first and
second semester), evaluation exercises and the previous examination paper when you prepa
examination. The questions in the upcoming examination paper are similar to the problems in
above mentioned. You are also welcome to try the first semester’s assignments.
The solutions are
available on myUnisa under Additionalresources.Remember, practice makes perfect!
The more
examples you work through the more you will be able to recognise a problem and know how
it. Please visit the Announcement tab on myUnisa as I regularly post some extra notes for y
convenience.An announcement on the examination as aswell
the solutions of one of the previous
examination papers, will be posted just before the exam.
You are also welcome to contact me by e-mail, fax, telephone or a personal appointment if y
help regarding the study material.
My contact details and contact hours are as follows:
Office:
E-mail:
1 Solution Summary
The following is a summary of the correct answers:
Q 1 Option 3 Q9 Option 4
Q 2 Option 2 Q 10 Option 1
Q 3 Option 5 Q 11 Option 4
Q 4 Option 1 Q 12 Option 1
Q 5 Option 4 Q 13 Option 3
Q 6 Option 4 Q 14 Option 1
Q 7 Option 2 Q 15 Option 4
Q 8 Option 3
2
, lOMoARcPSD|24668432
DSC1630/204/2
2 Assignment 04 – Detailed Solution
1. We need to determine the standard deviation of the number of Using
housesthe
sold.
statistical
keys of our calculator and entering the data points, we determine that the
x is:
value of s
sx = 6,60808 . . .
≈ 6,6.
The standard deviation is 6,6.
EL-738
Switch to STA mode with two varia-
bles
HP10BII
MODE 1 1
Clear allthe keys C ALL
Clear allthe memory keys P
2ndF M CLR 0 0 CL [on → M key]
Enter the data Enter the data P
5 (x,y) [nextto the ENT keys] 500 5 INPUT 500 P +
DATA [on the ENT key] 15 INPUT 900 P+
15 (x,y) 900 DATA 19 INPUT 1 500 P +
19 (x,y) 1 500 DATA 7 INPUT 2 000 +
7 (x,y) 2 000 DATA Calculate s
Calculate s sx , sy [on 8 key]
ALPHA s x = 6.60808. . . is displayed.
sx = 6.60808. . . is displayed.
CancelSTA mode:
MODE 0
[Option 3]
2. We need to determine the correlation coefficient
r of the fitted line that represents the data.
The correlation coefficient tells you how strong the linear relationship between the two
data is.
Using the statistical keys of our calculator and entering the data points we determine th
correlation coefficient is
r = 0,16428 . . .
≈ 0,16
3
