Assignment (Individual)
1. Describe the following the basic concepts
a. Variables
b. Dependent and predictor variables
c. How statistics is becoming an essential in decision making? explain broadly
d. Why taking a sample from the target population is needed?
e. Identify the basic difference between the parameter and statistic. Elaborate with more examples
f. Explain how the sample taken from the target population represents the target population.
2. Suppose a research want to identify the major factors and challenges influencing customers satisfaction in Commercial Bank of Ethiopia
Identify the dependent variable and explanatory variables. State the type of the variables as quantitative and qualitative, then fix as the nominal, ordinal and scales
3. Suppose that the level of satisfaction (low, medium and high) of 100 customers are given as such
Low
|
Medium
|
Medium
|
Low
|
Medium
|
Medium
|
Low
|
High
|
Medium
|
Low
|
Medium
|
Medium
|
Low
|
Low
|
MEDIUM
|
Medium
|
Medium
|
Medium
|
Medium
|
Low
|
High
|
Medium
|
High
|
Low
|
Medium
|
Low
|
High
|
Medium
|
High
|
Low
|
High
|
High
|
Medium
|
High
|
High
|
Low
|
High
|
Medium
|
Medium
|
High
|
Low
|
Low
|
Low
|
Low
|
Low
|
High
|
Low
|
High
|
Low
|
Medium
|
Medium
|
Low
|
Medium
|
Medium
|
Low
|
High
|
Medium
|
Low
|
Medium
|
Medium
|
Low
|
Low
|
MEDIUM
|
Medium
|
Medium
|
Medium
|
Medium
|
Medium
|
High
|
Medium
|
High
|
High
|
Medium
|
Low
|
High
|
Medium
|
High
|
Low
|
High
|
High
|
Medium
|
High
|
High
|
High
|
High
|
Medium
|
Medium
|
High
|
Low
|
Low
|
Low
|
Low
|
Low
|
High
|
Low
|
High
|
a. Use the STATA or SPSS packages and construct a categorical frequency distribution. Identify the maximum level of satisfaction. Justify this by using the both simple barchart and pie chart as well.
4. The growth domestic product of two countries X and Y for different ten consecutive years is given as such.
Year
|
2000
|
2001
|
2002
|
2003
|
2004
|
2005
|
2006
|
2007
|
2008
|
X
|
6.5
|
6
|
7
|
11
|
10
|
9
|
10.5
|
11
|
12
|
Y
|
4
|
7
|
9
|
11
|
12
|
14
|
14
|
15
|
14
|
a. Compute the mean for the GDP of X and Y
b. Compute the standard deviation
c. Compute the Coefficient variation and interpret
d. Compute the skewedness and kurtosis explain what the result shows
e. Show the histogram for both X and Y describe the graphs
5. Suppose the following data indicates the data collected from the 30 blood type of the patients of COVID 19 in South America
a. Summarize the above data and display the frequency distribution. Then identify the predominant blood category
b. Again produce the simple bar chart and pie chart indicate the predominant blood category.
6. Consider the following distribution of the data
Gender
|
College
|
Total
|
Natural
|
Social
|
Engineering
|
Male
|
400
|
300
|
1200
|
1900
|
Female
|
200
|
100
|
300
|
600
|
Total
|
600
|
400
|
1500
|
2500
|
a. Express the above data producing the cross tabulation of sex versus college in percentage.
b. Draw the simple bar-chart considering only colleges and then after using the sex alone.
c. Draw the multiple bar-chart using the gender along the x axis and college as the legend.
d. Draw the multiple bar-chart using the college along the x axis and gender as the legend.
7. Suppose that the following data indicates the amount of waste disposal at Addis Ababa city from 2000-2010
Years
|
2000
|
2001
|
2002
|
2003
|
2004
|
2005
|
2006
|
2007
|
2008
|
2009
|
2010
|
Amount in Kuntal
|
29
|
29
|
32
|
33
|
34
|
55
|
60
|
65
|
70
|
75
|
80
|
a. Draw the simple bar chart for this data.
b. Indicate the pattern of this data
8. The data shown here below indicates distribution of waste management in Ambo Town
Kebeles
|
Kebele 1
|
Kebele 2
|
Kebele 3
|
Kebele 4
|
Kebele 6
|
Wastage in Kuntals
|
Low
|
10
|
11
|
12
|
15
|
16
|
Medium
|
15
|
18
|
19
|
19
|
20
|
High
|
24
|
26
|
28
|
30
|
35
|
a. Draw the cross tabulation status of wastage versus ambo town
b. Draw the pie chart of the kebeles and identify in which there is high wastage
c. Draw the simple bar chart related to the status of wastage and identify in which high amount of wastage is produced
d. Draw the multiple bar chart status of wastage versus kebeles
9. The researcher is very interested to identify the major factors responsible for the disposal wastage which is measure in 100 Kuntals over the last 10 years.
22, 24, 45, 56, 55, 67, 68, 80 88 90
a. Identify all the dependent and independent variables related to this example.
b. Summarize the data using the descriptive statistics (range, mean, standard deviation, variance, skewedness, kurtosis and median,