Answer:
a) The required sample size is 54926
b) The sample size is not practical because it is too large to consider
Step-by-step explanation:
Given:
Sample mean = Margin of error, E = 0.011
Confidence level = 99%
Za= 100%-99%=1% => 0.01
Standard deviation, s.d =
a) For required sample size, n:
From the normal distribution table,
NORMSDIST(0.005)
= 2.5758
The required sample size will now be:
= [234.3636]²
= 54,926.314 => 54926
Sample size is approximatelty 54926
b) The sample size is not practical because it is too large to consider. It will be very hard to collect a sample data of almost 54926 subjects