Ten Samples of a Process Measuring the Number of Returns

Multiple Choice

Ten samples of a process measuring the number of returns per 100 receipts were taken for a local retail store.The number of returns were 10,9,11,7,3,12,8,4,6,and 11.Find the standard deviation of the sampling distribution for the p-bar chart.

A) There is not enough information to answer the question.
B) .081
C) 8.1
D) .0273
E) .0863