To select 10 companies out of total 24 companies we have used random sampling.
Simple random sampling refers to a sampling method that has the following properties.
The population consists of N objects.
The sample consists of n objects.
All possible samples of n objects are equally likely to occur.
The main benefit of simple random sampling is that it guarantees that the sample chosen is representative of the population. This ensures that the statistical conclusions will be valid.
There are many ways to obtain a simple random sample. One way would be the lottery method. Each of the N population members is assigned a unique number. The numbers are placed in a bowl and thoroughly mixed. Then, a blind-folded researcher selects n numbers. Population members having the selected numbers are included in the sample (Treynor 2008).
The selected companies are:
1
Abcam PLC
2
Antisoma PLC
3
Ark Therapeutics Group PLC
4
Immupharma PLC
5
Kiotech International PLC
6
Osmetech PLC
7
Regen Therapeutics PLC
8
Reneuron Group PLC
9
Senetek PLC
10
Vernalis PLC
Graphical representation for the Close Price
From the above graph it can be found out that that there is increasing trend.
It can be seen that there is a increasing trend in the close price for this company.
there is a decreasing trend in this data set.
It can be seen that there is decreasing trend in this data set.
There is not such an obvious trend in this data set.
Again in this data set it can be seen that there is no trend.
From the above graph it can be seen that that there is an decreasing trend.
Descriptive statistics
Descriptive Statistics
N
Minimum
Maximum
Sum
Mean
Std. Deviation
Variance
Antisoma
60
14.00
53.25
1662.75
27.7125
9.14535
83.637
Ark
60
14.50
149.02
4959.52
82.6587
32.60473
1.063E3
Immupharma
60
42.50
111.75
3838.00
63.9667
16.49618
272.124
Kiotech
56
.88
11.00
246.77
4.4066
2.30798
5.327
Osmetech
60
1.88
30.00
977.21
16.2868
9.14804
83.687
Regen
60
2.13
187.50
4234.16
70.5693
55.91218
3.126E3
Reneuron
54
2.75
40.00
783.57
14.5106
9.33517
87.145
Senetek
60
.90
3.20
108.43
1.8072
.52022
.271
Vernalis
60
1.00
999.76
1.44E4
2.4063E2
367.14619
1.348E5
Valid N (listwise)
54
The above table provides descriptive statistics for all the 10 given companies.
One way ANOVA
A One-Way Analysis of Variance is a way to test the equality of three or more means at one time by using variances.
Assumptions
The populations from which the samples were obtained must be normally or approximately normally distributed.
The samples must be independent.
The variances of the populations must be equal.
Hypotheses
The null hypothesis will be that all population means are equal, the alternative hypothesis is that at least one mean is different.
Ho: the average closing price for all the 10 companies is equal or there is no significance different in the average closing price.
H1: there is a significant difference in the average closing price.
ANOVA
Company
Sum of Squares
df
Mean Square
F
Sig.
Between Groups
1.009E7
9
1120863.538
70.837
.000
Within Groups
8686886.586
549
15823.109
Total
1.877E7
558
From the above table it can be figured out that there is a significant difference in the average closing price since the level of significance difference is less than p value.
Post-hoc analysis
Post-hoc analysis, in the context of design and analysis of experiments, refers to looking at the data—after the experiment has concluded—for patterns that were not specified a priori. It is sometimes called by critics data dredging to evoke the sense that the more one looks the more likely something will be found. More subtly, each time a pattern in the data is considered, a statistical test is effectively performed. This greatly inflates the total number of statistical tests and necessitates ...