What does k signify in dfBG= k-1 for Two-Factor ANOVA?

In an experiment to determine whether seeding clouds with silver iodide increases rainfall, 52 clouds were randomly assigned to be seeded or not. The amount of rain they generated was then measured (in acre-feet). Would we use the first line or the second line of the independent-samples t-test results from SPSS?  

Which of the following describes what a confidence interval does?

A college professor reports that students who finish exams early tend to get better grades than students who hold on to exams until the last possible moment.  The correlation between exam score and amount of time spent on the exam is an example of ____.

On average, what value is expected for the F-ratio if the null hypothesis is true?

Which of the following is an example of a situation for which a repeated-measures ANOVA would be the most appropriate?

Determining the class standing (1st, 2nd, and so on) for the graduating seniors at a high school would involve measurement on a(n) ____ scale of measurement.

What is the range of the following scores: 16 14 16 18 24 29

What value is estimated with a confidence interval using the t statistic?

If an analysis of variance is used for the following data, what would be the effect of changing the value of SS1 to 50?Sample DataM1 = 10    M2 = 15SS1 = 90    SS2 = 70