Answer:
A
Step-by-step explanation:
Given
= 
Multiply both sides by 20 to clear the fractions
16 = z → A
The answer is 23.1 repeating
Answer:
x=1
Step-by-step explanation: x will always be one unless the value of x is given for example, x wouldnt be one if in the question it says x=10 or x=9 or any number other than one
Answer:
The 95% confidence interval
Step-by-step explanation:
From the question we are told that
The sample mean is 
The standard deviation is 
The sample size is n = 8
Given that the confidence level is 95% then the level of significance is

=>
Generally from the normal distribution table the critical value of
is
Generally the margin of error is mathematically represented as

=> 
=> 
Generally 95% confidence interval is mathematically represented as
=>
=>