Statistics for Geographers (GPLA2103)

BA. Geography and Planning - GP

Semester: First Semester

Level: 200

Year: 2016

Answers (200 )
SECTION A
1. Is the percentage deviation from the means: a) Variance b) Coefficient of index c) standard deviation d) Mean deviation
2. Is an advantage of using the standard deviation
a) Used
in measuring confidence level in statistic conclusion b) used in drawing conclusion c) used to express
data in different units d) very accurate in calculating index of variation
3 The mathematical calculation to show how wide the spread of a variable is, is known as a) variance b) Coefficient of index c) standard deviation
d) Spearman’s rank correlation coefficient
4) Is the formula for calculating the Spearman’s rank correlation coefficient
a)
1
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c) 1
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d) 1
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5. To find the relationship between two variables
one
of the most appropriate technique to use is : Association of correlation b) Association of correlation
c) Measure of association of correlation d) Correlation of association
6) A measure which shows how each value in the set varies from the mean is a) Standard deviation b) Coefficient of deviation c) variance d) standard deviation
7)
a) What is the coefficient of index, when standard deviation is 1.2 and mean 24 a) 5% b. 5.25% c) 5.72% d) 5.155%
Which is the correct interpretation of the result of the spearman’s rank. .
a) Weakly positive, b) Weakly negative c) Perfect negative d) strongly negative
8) If all values in a data set occurs with equal frequency, it is known as
9) The maximum possible difference in a data set is referred to as ?
10) Is the correct formula for calculating variance -
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b
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c)
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11)
In Statistics Ho means
12) Identify the correct characteristics of an Asymmetrical distribution
a) Either positively or negatively skewed b) No No skews c) Equal positive and negative skews
13) The study of methods and tools to describe and interpret data is known as?
14) The scale of measurement that allows set to be placed in a ranked order
a
)
Nominal scale b) Interval scale c) Ordinal scale d) Ratio scale
SECTION B
1. In a field work exercise to investigate changes in the height of plants along a transect by level 1 Geography students of the University of Bamenda, the
following heights were measured at 7 different points 620mm, 570mm, 300mm, 410mm, 280mm, 175mm, 150mm
i) Calculate the variance (6marks) ii) Calculate standard deviation (2marks) iii) state the coefficient of index or variation (2marks)
2. Study the hypothetical map below which shows some rural settlements lettered A to N in an area of 110km
2
and answer the questions that follow
i) What is the nearest neighbor analysis (3 marks)
ii) Using the formula for Rn, calculate the nearest neighbor index for the points (6 marks show all steps)
iii) What is the significance of your result (1mk)
3) Study the table below which shows relative humidity for the months of the year and rainy days of the month
Month
J
F
M
A
M
J
J
A
S
O
N
D
Relative Humidity
24.5
26.4
22.4
20.2
21.1
30.6
44.4
57.7
45.5
30.3
28.2
26.6
Rainy Days
0.3
0.1
0.2
0.2
1.1
4.2
8.5
8.9
4.6
0.6
0.1
00
i) Establish a new table, inserting the missing column and figures (4 marks)
ii) State the null hypothesis tested (1 mark)
iii) Calculate the correlation between the relative humidity and rainy days (4 marks Show all working).
iv) Describe the relationship between related humidity and rainy days (1 mark)