1. A hospital researcher is interested in the number of times the average post-op patient will ring the nurse during a 12-hour shift. For a random sample of 50 patients, the following information was obtained. What is the expected value? (Answer with 2 decimal place accuracy.)

x	P(x)
0	P(x=0)=3/50
1	P(x=1)=9/50
2	P(x=2)=15/50
3	P(x=3)=12/50
4	P(x=4)=8/50
5	P(x=5)=3/50

2. In a sample of 1000 middle school and high school students. A student is selected at random from the sample.

a) Find the probability the student is a middle school student and does play soccer. (Answer using 3 decimal places.)

b)The student does not play soccer or is a middle school student. (Answer using 3 decimal places.)

Play Soccer	Do Not Play Soccer	Total
Middle School Student	76	449	525
High School Student	63	412	475
Total	139	861	1000

3.

X Pathify X Dashboard - X Quiz: Final Ex X + X https://vcccd.instr... . . . O No, I do not understand the statement above and will be skipping this test. Question 2 6 pts ents 1. Consider the following four distributions of quiz scores (A, B, C, D): .... .... quizA . ..... ... quizB Zoom quizC quizD co to N - 10 Quiz Scores port uations Arrange these in order from largest standard deviation to smallest standard deviation. O D,B.A,C O A,C,D.B O C.D,B.A O D.C, B,A O A,B.C.D O A, D.C, B D Question 3 6 pts 11:13 AM x 12/11/2022