49q2 - 25 is the answer to the question
Answer:

Step-by-step explanation:
From the question we are told that:
Population mean 
Population standard deviation 
Sample size 
Generally the equation for Standard error is mathematically given by



B ( i think )
i might be wrong though
To find the mean, add all the numbers together and divide by the amount of numbers there is
89 + 92 + 97 + 81 + 96 = 455
455/5 = 91
91 is Andrew's mean score, and is your answer
hope this helps