The upper one is correct. Because 0,75% = 0,0075 ( :10) and since the interest rate is positive it has to be 1 + ...
        
             
        
        
        
Answer:
b^20/a^12
Step-by-step explanation:
b to the power of 20 over a to the power of 12
 
        
             
        
        
        
Answer:
a) 0.4770
b) 3.9945
c) z-statistics seem a large value
Step-by-step explanation:
<u>a. Find the standard deviation of the sample proportion based on the null hypothesis</u>
Based on the null hypothesis:
 : 0.35
: 0.35
and the standard deviation σ =  =
 = ≈0.4770
 ≈0.4770
<u>b. Find the z statistic</u>
z-statistic is calculated as follows:
z= where
 where 
- X is the proportion of employees in the survey who take advantage of the Credit Union ( ) )
 is the proportion in null hypothesis (0.35) is the proportion in null hypothesis (0.35)
- s is the standard deviation (0.4770)
- N is the sample size (300)
putting the numbers in the formula:
z= = 3.9945
 = 3.9945
<u>c. Does the z statistic seem like a particularly large or small value?</u>
z-statistics seem a large value, which will cause us to reject the null hypothesis. 
 
        
             
        
        
        
Answer:
<h2>

</h2>
Step-by-step explanation:

#Let'sLearn