Answered: situation (one each) by which the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Give situation (one each) by which the different inferential statistics can be used. State the corresponding null and alternative hypothesis.

1. t-test of significant difference

●Between sample & population means

●Between independent samples

●Between dependent samples

2. t-test of significant relationship

3. Z-test of significant of ø

4. Z-test of significance of population peoportions

Statistics that allow for inferences or estimates about the population. Inferential statistics enable analysts come to conclusions about the population based on sample data. Inferential statistics cover the basics of inferential statistics, all kinds of hypotheses tests and their confidence intervals, design of experiments, and statistical power and errors. It also includes point estimation techniques, limit theorems, sampling distributions, approximations, and bounds. Correlation, regression, and association are also covered under inferential statistics to infer relationships between variables.

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Follow-up Question

DATE
a. Time
36. All except one of the following are examples of continuous variable.
b. temperature
c. marriages
d area
37. Parameter is to population, as estimate (statistics) is to
a. Projection
b. sample
c. correlation
d. regression
a
38. It is the most effective method of presenting result findings.
Textual b. tabular
c. semi-tabular
d. graphical method
39. Which of the following is NOT an example of a qualitative data?
8. Course
b. race
C. Scores
d. sex
40. Six students were ranked in the oratory ability and essay writing ability. A correlation
coefficient of 0.66 was obtained. In which way, can we best interpret the result?
a. A student who is good in oratory tends to be poor in essay.
b. A student who is poor in oratory tends to be good is essay writing.
C.
A student who is good in oratory tends to be good in essay writing
d. The information is lacking
PART 11.
Describe the following statistical tools (3 points). Give example studies/situations for each (2 points)
1. T-test of significant difference between means for dependent samples
2.
T-test of significant difference between means for independent sampics
3. Onc Way Analysis of Variance (ANOVA)
4.
Simple Linear Correlation Analysis
5. Multiplc Linear Regression Analysis
6. Chi-Squarc
7. Z-Test
8. Coefficient of Concordance
PART IV.
Given the following Situations, supply what are asked for
1
A researcher wants to find out whether the level of creativity of the master teachers in the
Division of Ilocos Sur is higher than the non-master teachers at 0.005 probability level. She
therefore randomly selected 500 teachers from and administered a creativity instrument. This
instrument make use of a5 point rating scale.
Possible research title:
Ho:
Ha:
Appropriate test: __
Reason:
2
Mr. X, gathered data on personal-related factors such as age, sex, average HS grade, type of
school graduated from, parents' educational attainment among freshmen entering the
University of Northern Philippines. He also gathered data on the result of their UNP-College
Admission Test. He wanted to find out whether the characteristics of the students measured in
terms of the above-stated personal-related factors have something to do with the result of their
UNP CAT.
Possible research title:
Ho:
Ha:
Appropriate test:
Reason:

Transcribed Image Text:115 Self Test 2 1. A group of administrators attended a training along Total Quality Management (TQM). Their administrative competence through a questionnaire, and data about tabulated as follows: their profile were determined before and after attending the program. These are Sex R-male 0-female Admin 1 Age Admin Competence Before Admin Competence After Admin Exp yrs. 0 42 4 5 3 1 52 4 5 5 1 39 3 4 1 0 47 3 4 5 0 40 4 4 1 6 1 50 5 5 8 7 1 52 5 4 7 0 48 4 4 4 9 1 46 5 4 6 10 0 54 4 5 8 Determine the degrees of relation between the following variables a. Sex and change in Admin Competence b. Age and change in Admin Competence c. Admin Experience Admin Competence Before 2. Give at least one detailed research situation including how to measure the variables and the categories if there are to illustrate each of the eight measures of correlation. 234N 5

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