1 answer

A group of screwdrivers produced in a day at a particular factory has a defect rate...

Question:

A group of screwdrivers produced in a day at a particular factory has a defect rate of 0.7%. Suppose a quality inspector rand
A group of screwdrivers produced in a day at a particular factory has a defect rate of 0.7%. Suppose a quality inspector randomly inspects 500 screwdrivers Complete the following statement: The quality inspector should expect defective screwdrivers, with an error of 1:40 1:0.4% 35:0.45 3.5:0.4

Answers

Solution:

p = 0.007, n= 500

using sampling distribution of sample proportion,

mean = np = 3.5

error = √p(1-p)/n= 0.004 = 0.4%

  • 3.5;0.4%
.

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