CJ 381 Final Exam Questions With Accurate Solutions.

If we find that the differences between the sample mean is a rare event, we will conclude that - correct answer The null hypothesis is rejected For a study that contains 2 groups with a total of 18 participants, how many degrees of freedom are there for a dependent means t-test? - correct answer 17 (subtract 1 from the number) T or F- If the standard error of the difference between two samples is equal in a pooled variance, estimate formula would be used. - correct answer True T or F- A researcher wishing to compare the values of parents and children collects data from 10 children and their parents. The t-test for dependent means would be the appropriate statistical analysis. - correct answer True Which test allows for the researcher to identify which means are significantly different from each other? - correct answer Turkey's HSD Analysis of variance test is to be used when we are interested in conducting a hypothesis test where we had a ______ dependent variable and a ______ independent variable with three or more values. - correct answer Continuous, categorical T or F- If a researcher has found the F statistic is significant they must then conduct an eta-squared test to be able to report which groups means are significantly different from other groups means. - correct answer False T or F- A high F statistic means that there is more between-groups than within-groups variance, a finding that would lead us to reject the null hypothesis of equal populations means. - correct answer True What is the statistic used to measure the linear correlation between two interval/ratio level variables? - correct answer Pearson correlation coefficient The coefficient of determination is interpreted as - correct answer The proportion of the variance in the y variable that is explained by the x variable. T or F- If a researched found the r of the correlation to equal .58 then the variation explained would be 58%. - correct answer False T or F- A Pearson correlation coefficient cannot be negative. - correct answer False T or F- If the pattern of the data points and the line drawn through them is an ascending one, we can conclude that the correlation between x and y is positive and linear. - correct answer True