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Questions and Answers
Which type of sampling is based on equal probability?
Which type of sampling is based on equal probability?
What is the mean of a Chi Square distribution with 6 degrees of freedom?
What is the mean of a Chi Square distribution with 6 degrees of freedom?
What type of test is a Chi Square test?
What type of test is a Chi Square test?
What is the purpose of Hypothesis testing?
What is the purpose of Hypothesis testing?
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What is the prerequisite for applying the Chi Square test?
What is the prerequisite for applying the Chi Square test?
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What is the level of significance in the given problem?
What is the level of significance in the given problem?
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Study Notes
Sampling Methods
- Simple random sampling is a sampling method based on equal probability.
Chi-Square Distribution
- The mean of a Chi-Square distribution with 6 degrees of freedom is 6.
- Chi-Square is a non-parametric test.
Research Methods
- Methods of research include:
- Experimental research
- Quasi-experimental research
- Survey research
- Case study research
- Content analysis research
Research Design
- Two types of research design are:
- Exploratory research design: used to explore a new topic or area of study
- Explanatory research design: used to explain the relationship between variables
Characteristics of a Good Sample
- A good sample should be representative of the population
- A good sample should be large enough to be reliable
- A good sample should be free from bias
Importance of Research
- Research is important because it helps to:
- Identify problems and opportunities
- Generate new knowledge
- Improve decision-making
- Solve problems
Literature Review
- Sources of literature review include:
- Academic journals
- Books
- Conference proceedings
- Online articles
- Government reports
Non-Probability Sampling Methods
- Non-probability sampling methods include:
- Convenience sampling
- Purposive sampling
- Quota sampling
- Snowball sampling
Hypothesis Testing Procedure
- Steps in hypothesis testing include:
- State the null and alternative hypotheses
- Select a significance level
- Calculate the test statistic
- Determine the p-value
- Make a decision based on the p-value
Chi-Square Test
- The Chi-Square test is used to determine if there is a significant difference between observed and expected frequencies.
- The test is used in the given problem to determine if brand preference is the same for all cities.
Type I and Type II Errors
- Type I error: rejecting a true null hypothesis
- Type II error: failing to reject a false null hypothesis
- The probability of Type I error is represented by α (alpha)
- The probability of Type II error is represented by β (beta)
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Description
Test your knowledge of statistics and research methods with this quiz. Questions cover topics such as sampling methods, Chi Square distribution, and research design. See how well you can answer these challenging questions!
