KREJCIE AND MORGAN SAMPLING METHOD

Sampling methods are used to select a sample from within a general population. Proper sampling methods are important for eliminating bias in the selection process. They can also allow for the reduction of cost or effort in gathering samples. Common methods of sampling include simple random sampling (completely random selection from the population), systematic sampling (ordering the population and selecting at regular intervals), stratified sampling (splitting the population into categories and randomly selecting from within each category), matched random sampling (population is divided into pairs based on a criterion and then randomly assigned to groups), and panel sampling (applying the same test over time to randomly selected groups).

 One of the most used method is the Krejcie and Morgan Sampling Method. To simplify the process of determining the sample size for a finite population, Krejcie & Morgan (1970), came up with a table using sample size formula for finite population.
krejcie-morgan-sample-size-table


Comments

  1. Unknown24 March 2019 at 10:59

    is there a confidential or error estimate for the sample

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  2. Devi18 September 2019 at 07:44

    yes
    95% of confidence level with 5% of error estimate.

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  3. masomos4 October 2019 at 00:32

    You are right Devi..

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  4. Unknown4 August 2020 at 06:07

    How about calculating a sample size greater than 100,000 ..it gives a relatively large sample size which doesn't seem to make sense

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    Replies
    1. Sastrolegi14 August 2020 at 09:23

      Use extrapolation. I try for N 10.000 until 100.000 result : exponential (R2 = 0.97) and linier (R2 = 0.98).
      Example: N = 1000000, how many S ?
      b = (100000 - 10000)/(384 - 373) = 8181
      S = 384 + (900000 : 8181)
      S = 494

      Delete
  5. Anonymous10 December 2020 at 21:55

    can it be used for convenience sampling method?

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  6. Unknown24 February 2021 at 00:32

    What is the lowest sample size for a comparative study of three groups. Can one say 50 from each group with the sample size being 150 in total?

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    Replies
    1. Unknown26 January 2022 at 06:14

      You are advised to use stratified sampling technique in this case

      Delete
  7. Unknown17 February 2022 at 14:50

    How about if there are 48 student, how am I going to know the number of respondents if 45 and 50 are only indicated in the table?

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    Replies
    1. Unknown7 April 2022 at 04:15

      Take 50 for your calculations so you will have a sample size of 44

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    2. syuhadaibrahim7 December 2022 at 07:41

      This comment has been removed by the author.

      Delete
    3. syuhadaibrahim7 December 2022 at 07:43

      sorry, my question is why we need to take 50 rather than 45

      Delete
  8. Abdul16 June 2023 at 15:45

    Pls help me how to know the sample size of 250 using the table

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  9. Abdul16 June 2023 at 15:47

    Again another question how to determine the sample size of 250 using the table pls I need it quickly pls abeg

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  10. masomos16 June 2023 at 18:34

    Use sample size online calculator , Raosoft calculator...

    ReplyDelete

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