Statistics Group Project TASK 13 (a) Survey method3 (b) Sampling method3 (c) Sample selection method3 (c) Estimation errors 13 (a) Coefficient of resoluteness for grade of exem

Statistics Group Project

Table of Contents
TASK 1............................................................................................................................................3
(a) Survey method..................................................................................................................3
(b) Sampling method for selecting a sample:.........................................................................3
(c) Determination of the dependent and independent variables and identification of the data
type:........................................................................................................................................4
(d) Issues ................................................................................................................................4
(e) Frequency histogram ........................................................................................................5
(f) Scatter plot :.......................................................................................................................7
(g) Equation of estimated fitting line :...................................................................................8
(h) Summary ........................................................................................................................11
(i) Interpretation:..................................................................................................................13
TASK 2..........................................................................................................................................13
(a) Estimate errors................................................................................................................13
(b) Coefficient......................................................................................................................13
(c) Attuned coefficient of resoluteness for grade of exemption:..........................................14
(d) ........................................................................................................................................15
(e) .........................................................................................................................................15
(f) Relation between tallness of father and son....................................................................16
(g) Relation between tallness of Mother and son:................................................................17

TASK 1
(a) Survey method
The survey method may be in two forms such as questionnaire and interviews. There will
be questionnaire method was select to conduct a survey. Questionnaire contains a number of
questions in sequence about various aspects. These questionnaire are presented to the
respondents and collected their reviews through these questions. The questionnaire may be in
form of printed paper or electronic. It may be emailed to various respondents if physically
distribution is not possible. It also provide choice of answers to the respondents so that they can
make easy decision while filling up the questionnaire. Questionnaire may be of various types
such as customer satisfaction questionnaire, product use satisfactory questionnaire, company
communication evaluation questionnaire, etc.. on the other hand it contain some specific
characteristics such as uniformity, exploratory, questions sequencing, etc..
(b) Sampling method for selecting a sample:
There are two types of sampling methods such as probability and non-probability.
Probability based techniques are more useful and reliable. Following are the probability based
techniques:
 Random sampling: As the name indicate that method is very simple which based on
totally selection of sample from individuals through automated process. The sample is
selected on random basis.
 Stratified sampling: This type of sampling method used when there was a large size of
population. According to that sampling technique the whole population are divided into
small strata and then sample is chosen from each group.
 Cluster sampling: that type of method contains the random selection of samples from
geographical spread variables.
Probability based sampling methods are more reliable because these provides the total population
based sample which present the guaranteed results based on whole population.
There are some specific steps to conduct probability sampling, which are as follows:
1. choosing of interested population carefully.
2. Determination of appropriate sample frame.
3. Selection of sample according to sample frame and start up of survey.

(c) Determination of the dependent and independent variables and identification of the data type:
The data are given for the preparation time and marks of students. The values which
does not consider by researcher is known as dependent variable. Independent variable are those
values which can be manipulated in experiment. Both the variables are important for the
interpretation of results, but the data given for the preparation time are independent in nature and
marks of the students are dependent.
Why? - The data for marks of the students are dependent and data for preparation time is
independent because the marks of students depends on the preparation of students. As the more
preparation students done they get more marks and if they give less time to their preparation then
they get less marks. So the data of marks of students is depend on the data of preparation time.
So that the dependent variables are marks of students and independent variables preparation of
data.
Data types : Variable is numerical in context to type of data.
(d) Issues
1. Lack of attention
2. Dishonesty
3. Differences in understanding and interpretation
4. Problems in expressing felling and emotions
5. Difficulty in analysing some questions
6. Biasses
7. Lack of personal relation with respondents
8. Accessibility issues
Explanation of two cases: Following are the explanation of two cases from the list of issues
which faced due to data collection with the help of questionnaire method:
Dishonesty: The foremost problem with this method is that the respondents are not
honest every time. Most of the respondents answers without any truthfulness and proper
attention. So the whole survey goes in wrong direction.
Differences in understanding and interpretation: most of the respondents interpret the
presented questions in wrong way so that answers were fluctuate according to distinct point of
view of respondents and researcher.