The difference between the value of the sample statistic and the value of the corresponding population parameter is called the _____.
a. statistical error
b. standard error
c. proportion error
d. sampling error
Question 2
Two percent of the parts produced by a machine are defective. Forty parts are selected. Define the random variable x to be the number of defective parts.
a. What is the probability that exactly 3 parts will be defective?
b. What is the probability that the number of defective parts will be more than 2 but fewer than 6?
c. What is the probability that fewer than 4 parts will be defective?
d. What is the expected number of defective parts?
e. What is the variance for the number of defective parts?
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