Determine Sample Size Without Population. Z 1645 p 05 e 004. 1 In some quantitative research stricter confidence levels are used eg.
You can do this by using a formula or by finding a sample size calculator online. Therefore the sample size can be calculated using the above formula as 10000 196 2 005 1-005 005 2 10000 1 196 2 005 1-005 005 2 Therefore a size of 72 customers will be adequate for deriving meaningful inference in this case. Using the sample size formula you calculate the sample size you need is which you round up to 211 students you always round up when calculating n.
Using the sample size formula you calculate the sample size you need is which you round up to 211 students you always round up when calculating n.
Where z 1645 for a confidence level α of 90 p proportion expressed as a decimal e margin of error. N Z2 P 1-PC2. Finally you can use these values to calculate the sample size that you will need. Necessary sample size Z-score2 standard deviation 1 - standard deviation margin of error2.
