Pre-4th Periodical Stat

What is the statistical method used in making decisions using experimental data?

• Simple analysis

• Hypothesis testing      

• Analytical testing

• Experimental testing

Which step in the hypothesis testing process involves formulating the appropriate null and alternative hypotheses on a population mean?

• Sample selection and data collection 

• Data analysis and interpretation     

• Determining the level of significance

• Identifying the research question and population of interest

When the population variance is assumed to be known, which of the following options identifies the appropriate form of the test statistic?

• T-test

• F-test

• Z-test

• Chi-square

When the population variance is assumed to be unknown, which of the following options identifies the appropriate form of the test statistic?

• T-test

• F-test

• Z-test

• Chi-square

When the population variance is assumed to be known, which of the following options identifies the appropriate rejection region for a given level of significance?

• Left-tailed test

• Right-tailed test          

• Two-tailed test

• Confidence interval

Which step in hypothesis testing involves computing the test-statistic value for the population mean?

• Sample selection and data collection 

• Data analysis and interpretation 

• Determining the level of significance

• Formulating the null and alternative hypotheses

Which step in the hypothesis testing process involves formulating the appropriate null and alternative hypotheses on a population proportion?

• Sample selection and data collection 

• Data analysis and interpretation     

• Determining the level of significance

• Identifying the research question and population of interest

When formulating the null and alternative hypotheses on a population proportion, which of the following options correctly represents the alternative hypothesis?

• The proportion is equal to a specific value.

• The proportion is greater than a specific value.

• The proportion is less than a specific value.

• The proportion is not equal to a specific value.

When computing the test-statistic value for a population proportion, which of the following options represents the appropriate statistical test?

• z-test

• t-test

• f-test

• chi-square test

Which of the following options best illustrates the nature of bivariate data?

• Measures of central tendency

• Scatter plot     

• Frequency distribution

• Confidence interval