Answer:
mZR = (4x + 160)°
Step-by-step explanation:
cause, mZR = mZN
;-))
The information is really hard to follow, you should ask the question with a screenshot of the data table.
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:
x = 13 , y = 29
Step-by-step explanation:
If you have any questions about the way I solved it, don't hesitate to ask!