sample size calculation

  1. A

    Sample Size Determination

    n=8, mean=5096, StDev=1460, SEmean=516.19 I need a 95% confidence interval no wider than $360. What is the minimum sample size required? I calculated this as 193, but was told I was incorrect. The issue may be with my bound, which I calculated to be 0.0706, or 7.06%. Using the formula...
  2. Z

    How do I calculate the Sample Size for this type of Survey?

    Hi all, I need to calculate the sample size for a survey I will be undertaking soon. The target population will be the clients of 8 hotels, forming part of the same company. The objective of the survey is to get the profile of the clients and their level of satisfaction. I've read that if the...
  3. I

    Using GPower3 to calculate sample size

    I ran the following calculations in GPower3 but I am doubting my method and I am looking for suggestions but also perhaps a beginners way of checking this mathematically. I have a one way test, with an r of .25 an alpha of .05 and a power of .80, I came up with a required sample size of 95...
  4. E

    Need a help for sample size calculation

    I have a database of 1500 records and I am are going to use the database for future use, if the inaccuracy of the data elements (eg. Date of birth of each record) is less than 5% (or accuracy is more than 95%). I am planning to get a simple random sample from the database and check with the...