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Statistics exam questions
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Name: ___________________________________________________________ Nº: _________Statistics II
Master in Management
Nova School of Business and Economics
EXAM
18th March 2019, 4:00 pm
Duration: 1h30
INSTRUCTIONS
Turn off your mobile phone!
Authorized Material: Pen, calculating machine, a form (máx 1 sheet, front & back
but with no solved exercises1), statistical tables and this assignment.
Ensure that the statistical tables and the form are perfectly stapled.
Before starting the EXAM confirm that this assignment has 10 pages numbered 1 to
10. Please write your name and student number on pages 1, 8 to 10 of this
assignment.
This assignment must always be stapled.
The answers to the questions should be written in the locations indicated in this
assignment.
You can use the back of each sheet as a draft.
Any situation of plagiarism (such as the use of unauthorized material and/or
communication with colleagues) will have as immediate consequence a drop out in
the course this semester.
You are not allowed to ask questions during the EXAM.
You must remain seated in your place by the end of the EXAM.
When the time expires please turn your EXAM over and wait for its collection made
by invigilators.
1
The form and the statistical tables may be checked by the invigilators before/during the
examination
Nova School of Business and Economics 1
, Name: ___________________________________________________________ Nº: _________
About the EXAM
Thank you very much for all your work during this course: you were struggling to understand
everything that we have been discussing during our classes and absolutely amazing learning in such
a short time…
As you know usually Statistics III projects (CS) are the inspiration for these exams: not this time.
During Class 5 we randomly sampled 15 NovaSbe Student Weight (kg), Height (cm), Gender and
some other as Nationality and Age (years) and we ran some analysis…
For each question in Groups I to III indicate only one answer in the table in page 8
Each correct answer is worth 0,70 values
Each wrong answer is worth 0,10 negative (-0,10).
Each answer blank or poorly marked is worth 0.
Group I
With the sample of X - Weight (kg) we computed the following indicators:
15 15
x
i =1
i = 936 (x
i =1
i − x ) 2 = 2680,3931
Weight is Normally distributed. From the 15 students we found out that 6 are Men.
1. The Margin of Error for the proportion of Men, using a 95% confidence level
is aprox
a) 0,208
b) 0,248
c) 0,126
d) we cannot compute this Margin of Error
2. The Margin of Error for the mean Weight, using a 90% confidence level is
aprox
a) 6,291
b) 4,805
c) 5,877
d) we cannot compute this Margin of Error
Nova School of Business and Economics 2
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