Answer:
(22.12, 27.48)
Step-by-step explanation:
Given : Significance level : 
Sample size : n= 8 , which is a small sample (n<30), so we use t-test.
Critical values using t-distribution: 
Sample mean : 
Standard deviation : 
The confidence interval for population means is given by :-

i.e. 

Hence, the 95% confidence interval, assuming the times are normally distributed.= (22.12, 27.48)
Answer:
8z
Step-by-step explanation:
Since these are like terms, add the numbers together and then put the z on.
Answer:
what is the options
Step-by-step explanation:
Answer:
cpi
Step-by-step explanation: