Amanufacturer of small appliances purchases plastic handles for coffeepots from an outside vendor. if a handle is cracked, it is considered defective and must be discarded. a large shipment of plastic handles is received. the proportion of defective handles p is of interest. how many handles from the shipment should be inspected to estimate p to within 0.09 with 95% confidence?

119

Step-by-step explanation:

Since the prior estimate of population proportion of defective handles  (p) is unknown , so we take p= 0.5

Given : Margin of error : E=0.09

Critical value for 95% confidence interval :

Required sample size :-

Hence, the minimum sample size required = 119

i.e. 119 handles from the shipment should be inspected.

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step-by-step explanation:

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