Assume that 11% of Douglas College students are left-handed. Suppose you randomly select 100 students and let X= the number of left-handed students in the sample. (As above, we assume each "trial" is independent.) The probability histogram for X is shown below. Probability Histogram for the Number of Left-handed Students in a Sample of 100 0.14 0.12 0.1 0.08 0.06 0.04 0.02 X = Numer of Left-handed Students Calculate the standard deviation of . State your answer as a decimal rounded to four decimal places. 00T 96 76 88 08 72 12 Probability

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.