Question

A sample of size 30 is taken from the population of morel mushrooms and used to calculate an average height x ¯ = 4.6 centimeters.. Suppose the sample standard deviation is calculated to be s =0.5. What is the margin of error for a 90% confidence interval? Round your answer to 3 decimal places.

Answer 1

We have given that,                  
                  
Sample mean =4.6          
Sample standard deviation =0.5      
Sample size =30          
Level of significance=1-0.90=0.1          
Degree of freedom =29          
                  
t critical value is (by using t table)=1.699          
Margin of error

=0.155

Margin of error =0.155