ranashreyas01

How does the t-distribution differ from the Normal distribution?

6. For a two-tailed test with α = 0.05, what are the cutoff t values for a t-distribution with df = 30?

7. What is the relationship between sample size and cutoff t values?

8. Other factors kept constant, is it easier to reject the null hypothesis in a Z-test of a sample mean or a single-sample t-test?

72. What is the distinction between a linear relationship and a correlation between two variables?

73. If you are interested in whether variable X causes variable Y, what is the relevance of knowing the variables X and Y are correlated?

74. What is a spurious correlation? What do spurious correlations indication about the relationship between correlation and causation?

75. What is the relationship between correlation and prediction? What do we mean by a prediction model?

76. Assuming the null hypothesis is true in each case, if the results of 1300 studies are analyzed, each using the .05 significance level, on average __________ will be significant. (To fill in the blank, give a number between 0 and 1300).