Answer:
2.6549
Step-by-step explanation:
Since the sample size n=65, the degrees of freedom is n-1=65-1=64
The critical value=
Using the t-table and selecting df=64 and 
since it’s a 2 tail the corresponding t-score is 2.6549
Therefore, the critical value is 2.6549
Answer: the answer is 1.2 greater
Step-by-step explanation:
Answer:
the first one not the second one
Step-by-step explanation:
Answer:
14
Step-by-step explanation:
If he is solving 2 problems per minute and 8 minutes have passed, he has solved
2*8 = 16 problems
There are 30 problems and he has solved 16
30-16 = 14
There are 14 problems left to solve at the start of the 9th minute
