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Thread: STA301 Statistics and Probability GDB idea solution spring June 2011

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    Icon21 STA301 Statistics and Probability GDB idea solution spring June 2011

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    Graded MDB for STA301 will be opened on June 01, 2011 and will remain open till June 03, 2011. The topic of this GMDB will be,

    “Suppose you want to survey a colony of Lahore having 20 streets each of 150 houses. A sample of 10 houses is to be taken from each street. Explain how would you select the 10 houses from each street by systematic sampling”?

    Your comments should NOT exceed from 80-100 words.

    NOTE: Your comments MUST be posted with in due date and it will NEVER accept through e-mail.


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    Solution:

    Systematic sampling is to be applied only if the given population is logicallyhomogeneous, because systematic sample units are uniformly distributed overthe population.I want to sample 10 houses from a street of 150 houses.150/10=15,so every 15th house is chosen after a random starting point between 1 and 15. Ifthe random starting point is 11,then the houses selected are house no11, house no 26,house no 41, houseno56,house no 71, house no86, house no101, house no116 ,house no 131

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    Thanx Brother, Be happy!

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    okay . . . . . .

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    An other solution of STA301 GDB Spring 2011

    STA301 GDB Spring 2011
    If we want to select a random group of 10 houses from each street having 150 houses using systematic sampling, we would simply select every 15th house in each street because 150/10 = 15. In this way 10 houses will be selected from each street and as there are 20 streets, so total 200 houses will be selected.

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