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A wholesaler in apples claims that only 4 % of the apples supplied by him are defective. A random sample of 600 apples contained 36 defective apples. Calculate the standard error concerning good apples. |
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Answer» Sample size = 600 No. of defective apples = 36 Sample proportion p = 36/600 = 0.06 Population proportion P = probability of defective apples = 4% = 0.04 Q = 1 – P = 1 – 0.04 = 0.96 The S.E for sample proportion is given by S.E = √PQ/N = √(0.04)(0.96)/600 = √0.000064 = 0.008 |
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