a) b) C) d) g) h) In symbols and words, what are the null and alternative hypotheses for this experiment? What is the standard error of the difference between the means? The SPSS output will provide you with the appropriate df. Determine whether they are correct or not by calculating the df by hand (write this on your separate sheet). What is the conclusion? Write up the results in APA format. What is the 95% confidence interval for these data? How would you determine significance using this interval? Explain what a Type I and Type II error would be for this study. Which one did we possibly make? Use the descriptive statistics generated in the output to find the power for this study: First, find 32mm (use formula 7.6A). Then find g (the sample estimate of d) using formula 8.4 (remember to take the square root of szpooled). Always use the absolute value of g (or d) for these calculations. Find 6 by using formula 8.3, remembering to replace d with g. Find the harmonic mean of the n's because you have unequal sample sizes. Assuming or = .05 (two tailed), use the table to find the power. Note: Do not be surprised if power is extremely large and use estimates (or relative values like power is greater than 98%) if you don't have exact values. What is the probability of a Type II error for this study? If power is very large, this might be very small. As above, use estimates or relative values if you don't have exact values. Using formula 8.7, what sample size would you have needed for a power of .90? Remember to use g instead of d (absolute value)