Need assistance in finding the df within for ANOVA testing.

For the df within I subtracted 8 from 8, but that gives me 0 which cannot be right because I would end up getting a Divided by 0 error for the MS within and the F. Can someone please explain how I may solve this? All I need is assistance with that part and I can solve the rest. I appreciate anyone that helps.

1. Test the claim that the exam scores on the eight College Algebra exams are equal. Use alpha error .05. Conduct follow up tests if necessary. Interpret all results.
Exam: 1 2 3 4 5 6 7 8
n: 24 24 24 24 24 24 24 24
mean: 62.21 68.17 70.59 63.84 74.35 66.44 65.00 62.37

Source SS df MS F
Between 2417.52 7 345.36 Error
Within 38147.32 (0)? Error
Total 40564.84 (7) ?

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

(20 points) a bank has been receiving complaints from real estate agents that their customers have been waiting too long for mortgage confirmations. the bank prides itself on its mortgage application process and decides to investigate the claims. the bank manager takes a random sample of 20 customers whose mortgage applications have been processed in the last 6 months and finds the following wait times (in days): 5, 7, 22, 4, 12, 9, 9, 14, 3, 6, 5, 15, 10, 17, 12, 10, 9, 4, 10, 13 assume that the random variable x measures the number of days a customer waits for mortgage processing at this bank, and assume that x is normally distributed. 2a. find the sample mean of this data (x ě…). 2b. find the sample variance of x. find the variance of x ě…. for (c), (d), and (e), use the appropriate t-distribution 2c. find the 90% confidence interval for the population mean (îľ). 2d. test the hypothesis that îľ is equal to 7 at the 95% confidence level. (should you do a one-tailed or two-tailed test here? ) 2e. what is the approximate p-value of this hypothesis?

|z| > (1/2) {-1/2, 1/2} {z|(-1/2) < z < (1/2)} {z|z < (-1/2) ∪ z > (1/2)}