Rudy answered 2 more questions correctly
...........
46x2=92
44x2=88
...........
92-88=4
Answer: Option 'd' is correct.
Step-by-step explanation:
Since we have given that
Margin of error = 0.5 years
Standard deviation = 5
At 90% confidence, z = 1.645
We need to find the minimum size of the sample they must take.
So,

Hence, Option 'd' is correct.
Answer: 4.625
Step-by-step explanation:
If I am not mistaken it is going to be the second one, 5^1/6