Download Test 1 2013

Statistics for Journalism
Test 1 (recuperation)
PROBLEM 1. The following is an excerpt from the last UK census in 2011.
Classify the variables in questions 7 and 9 as qualitative or quantitative. In the
case of qualitative variables, classify them as ordinal or nominal.
Variable
Qualitative
Quantitative:
Ordinal
Nominal
Question 20
Question 21a
PROBLEM 2. The 80 students in a Statistics for Journalism class evaluate their
lecturer from 1 (horrible) to 5 (fantastic). The partial results are given in the
following table.
Grade
Absolute frequency (ni)
1
Relative frequency (fi)
0,05
2
3
10
4
16
5
40
TOTAL
Complete the table.
PROBLEM 3. The table shows the ages of the 11 youngest ministers of the current
Spanish government.
40
45
52
54
53
52
54
61
61
61
61
Which of the following affirmations is correct?
a.
b.
c.
d.
The median age is 54 and the mean is 61.
The median age is 61 and the mode is 61.
The median age is 54 and the mean is 54.
None of the above.
Response
a)
b)
c)
d)
PROBLEM 4. The following bar chart of cumulative frequencies records the
number of different news programs seen each day by a total of 55 journalism
students
60
53
55
48
50
40
31
30
frecuencia acumulada
20
10
8
0
0
1
2
3
4
Which of the following affirmations is correct?
a.
b.
c.
d.
Response
a)
31 students watch exactly 1 news program every day.
48 students watch at least 2 news programs every day.
40 students watch between 1 and 2 news programs every day.
31% of the individuals sampled watch up to one news program every
day.
b)
c)
d)
PROBLEM 5. The following histogram shows the elasticity of demand for long haul
flights.
Which of the following affirmations is correct?
a.
b.
c.
d.
Response
a)
The standard deviation is 10.
The mean is higher than the median which is higher than the mode.
The mean is 1.
The mode is higher than the median which is higher than the mean.
b)
c)
d)
Space reserved for your calculations