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.
maybe 8:02 maybe not surew
Answer:
what? please give more details
Step-by-step explanation:
Answer:
6/72
Step-by-step explanation:
6/72 =0.0833333333