Statistics and Applied Econometrics
Essay by wdwds • October 3, 2016 • Exam • 254 Words (2 Pages) • 1,123 Views
Statistics and Applied Econometrics
Home work prepared by:
Bulembekova Salima
KAZGUU Fall-semester 2016
Master in Finance
Problem Set 1
Problem 1
A simple random sample is a special case where each population unit has an equal, known, non-zero probability of selection. A simple random sample is meant to be an unbiased representation of a group.
Non-simple random samples are:
– stratified
– cluster
Random sampling can be used for many population, by selecting without replacement a subset of population.
Problem 2
[pic 1]
Number of hours watched = 2,2,2,5,5,10,10,10,10,10
N=10
Mean = (2+2+2+5+5+10+10+10+10+10)/10 =6.6
The mean of the number of hours of television watched per week by 10 homemakers is 6.6
3. a)
Class interval | Interval width | Frequency | Frequency density | Cumulative frequency |
{1-100} | 100 | 7 | 0.07 | 7 |
{100-200} | 100 | 7 | 0.07 | 14 |
{200-300} | 100 | 4 | 0.04 | 18 |
{300-400} | 100 | 3 | 0.03 | 21 |
{400-500} | 100 | 3 | 0.03 | 24 |
{500-600} | 100 | 1 | 0.01 | 25 |
[pic 2]
b) Steam and leaf diagram
0 | 7 |
1 | 3 |
3 | 6 |
4 | 8 |
5 | 8 |
7 | 78 |
12 | 1 |
13 | 38 |
16 | 4 |
17 | 57 |
18 | 3 |
21 | 9 |
24 | 4 |
25 | 8 |
29 | 1 |
31 | 24 |
33 | 6 |
41 | 8 |
45 | 5 |
47 | 6 |
54 | 1 |
...
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