An employee at the department of new products in a company is conducting some re

Question

An employee at the department of new products in a company is conducting some research on the number of product parts a machine can assemble in an hour. Unbeknown to him, the population distribution is left skewed with a mean of 100 and a standard deviation of 10. The researcher takes a random sample of 200 hours and counts the number of product parts completed in each hour.

1. What shape will the data distribution probably have?

(a) Left Skewed

(b) Right Skewed

(c) Symmetric

(d) Multimodal

2. What is the expected value of the sample average number of product parts completed ineach hour?

3. What is the standard error of the sample average number of product parts completed in each hour?

Explanation / Answer

1) a) symmetric

2) Expected value = 100

3) standard error = 10/sqrt(200)

= 0.707l

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