Use the following information for questions:
Ellen is taking 4 courses for the semester. She believes that the probability distribution function for X = the number of courses for which she will get an A grade is given below.
-What is the standard deviation for the number of A's she will get?

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Use the following information for questions:
 Ellen is taking 4 courses for the semester. She believes that the probability distribution function for X = the number of courses for which she will get an A grade is given below. 
-What is the standard deviation for the number of A's she will get?

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The Answer of Use the following information for questions:
 Ellen is taking 4 courses for the semester. She believes that the probability distribution function for X = the number of courses for which she will get an A grade is given below. 
-What is the standard deviation for the number of A's she will get?

Use the Following Information for Questions