pleasehelp

the ratio of juniors to seniors is 9 to 8, if there are 51 juniors and seniors total, which percent of students are seniors? how do i figure this out?!

Q: Hours of TV Less than average: Greater than average: Mean 22.3 20.8 S.D 25.6 25.5 n 903 390 Use hypothesis testing procedures to determine if there is a statistically significant difference in the average number of days of church attendance across the...

Q: For each question, discuss the cost of making each type of error. 1. A customer purchases an item. Once they exit the store, the alarm goes off. This alarm goes off routinely for paying customers. 2. A patient is diagnosed as negative when a doctor det...

Q: Use the following information to determine whether or not you should reject or fail to reject the null hypothesis: SBetween=100 SSWithin=500 n per group=20 (i.e. total n=80) H0: µ1= µ2= µ3= µ4 H1: At least one mean is different α=.05 A: I constructed a...

* For 2 I meant when we SHOULD have rejected. NOT SHOULDN'T. Sorry.

Then I located F critical under the F table as the value of 1.98. My professor said when F calculated is less than F critical, you fail to reject. F calculated= 0.64 F critical= 1.98 0.64<1.98, so fail to reject?