GS Research Final Exam Part 7

Which of the following refers to data that are descriptive and characterized by categorical responses?

• Quantitative data

• Inferential data

• Qualitative data

• Continuous data

If a researcher selects every 5th individual from a list of 100 participants, what type of sampling is being used?

• Stratified sampling

• Simple random sampling

• Cluster sampling

• Systematic sampling

Which statistical test is most appropriate for comparing the mean height of students from two different schools?

• One way ANOVA

• Paired t test

• Independent t test

• z test for 1 sample

What sampling technique is used when the researcher selects participants based on their easy accessibility?

• Purposive sampling

• Cluster sampling

• Convenience sampling

• Quota sampling

A researcher analyzes the correlation between two variables and finds an r value of 0.72. What can be concluded about the relationship?

• Weak positive correlation

• Moderate positive correlation

• High positive correlation

• Very high positive correlation

Which of the following best describes the null hypothesis (Ho. in hypothesis testing?

• It represents the outcome the researcher hopes to achieve.

• It is the hypothesis the researcher wishes to reject, indicating no significant difference or effect.

• It always shows a significant relationship between variables.

• It only applies to qualitative data.

If a teacher wants to know if there is a significant difference between the performances of his morning and afternoon classes, which type of hypothesis test is appropriate?

• Two tailed test

• One tailed test

• Paired t test

• F test

What is the critical value approach used for in hypothesis testing?

• To determine if the sample size is sufficient

• To compare the test statistic with a critical value to decide whether to reject Ho

• To calculate the mean of the sample

• To estimate the population standard deviation

A researcher uses a p value of 0.02 in a study with a significance level of 0.05. What is the correct decision?

• Fail to reject the null hypothesis

• Reject the null hypothesis

• Adjust the significance level

• Increase the sample size

What is the role of regression analysis in quantitative research as described in the document?

• To compare means between two groups

• To establish relationships between two or more variables and predict outcomes

• To test hypotheses regarding population parameters

• To analyze categorical data