Statistical Techniques & Data Interpretation Quiz

What is the purpose of a t-test?

• To compare the means of two groups

• To compare the means of three or more groups

• To compare the variances of two groups

• To compare the medians of two groups

When should a nonparametric alternative to the t test be used?

• When the data are independent

• When the data are normally distributed

• When the data have equal variances

• When the data do not fit the assumptions of the t test

What type of t test should be used when comparing the mean of a sample to a known population mean?

• Z-Test

• Paired Samples t-test

• Two Samples t-test

• One-Sample t-test

What is the purpose of a Two Samples t-test?

• To compare the means of three or more groups

• To compare the means of two related groups

• To compare the means of two independent groups

• To compare the variances of two groups

What is the assumption for conducting ANOVA?

• Data are dependent

• Samples follow a uniform distribution

• Samples have been selected randomly and independently

• Each group should have different variance

What is the purpose of a One way ANOVA?

• To test whether the samples are drawn from populations with the same mean values or not

• To compare the means of two independent groups

• To compare the variances of two groups

• To compare the means of two related groups

What is the purpose of a Two way ANOVA?

• To analyze the effect of two independent variables on a dependent variable

• To compare the means of two independent groups

• To test whether the samples are drawn from populations with the same mean values or not

• To compare the variances of two groups

When can we apply the Mann-Kendall trend test?

• To compare the means of two groups

• To analyze the effect of two independent variables on a dependent variable

• To test for a trend in time series data

• To compare the variances of two groups

What are the hypotheses of the Mann-Kendall trend test?

• The null hypothesis assumes that there is no trend in the data

• The alternative hypothesis assumes that mean difference is not equal to zero

• The null hypothesis assumes that the true mean difference is equal to zero

• The alternative hypothesis assumes that there is a trend in the data

What is the purpose of Sen’s Slope Estimator?

• To compare the variances of two groups

• To estimate the slope of a trend in time series data

• To analyze the effect of two independent variables on a dependent variable

• To compare the means of two groups