Answer:-9
Step-by-step explanation:
71-62=9
62-53=9
53-44=9
It is negative because the numbers are decreasing
Answer:
30 40 percent
Step-by-step explanation:
it is less that 50
Answer: 0.701
Step-by-step explanation:
Formula :
, where
significance level ,
Population standard deviation, n= sample size.
As per given, n= 22

Critical z- value for 90% confidence level : 
Then,

Hence , error bound (EBM) of the confidence interval with a 90% confidence level= ± 0.701