Using this ordered dataset, what are the variance and the standard deviation?

ORDERED DATASET:

1.00 2.40 3.60 4.45 4.50 5.56 6.89 7.33 8.99 10.00

a.The variance is 4.02 and the standard deviation is 1.12

b.The variance is 4.78 and the standard deviation is 2.21

c.The variance is 5.03 and the standard deviation is 1.35

d.The variance is 8.14 and the standard deviation is 2.85

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Question7

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Suppose that the instructor of a math class will give six different versions of the final exam for a large class of 120 students. Each student will receive a version of the final exam determined by a simple roll of a die. With the roll of a fair die, the probability of getting Exam Version 6 is 1/6. Which of the following methods is being used here to determine probability?

a.Repeated sampling

b.Equally likely outcomes

c.The binomial distribution

d.The negative binomial distribution

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Using this table, what is the probability that a student chosen at random from among all first-year students is a Biology major?

	Biology Majors	Chemistry Majors	Total Students
First-Year Students	120	100	220
Second Year Students	150	150	300
Total Students	270	250	520

a.120/220

b.120/270

c.120/520

d.270/520

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Suppose that 30% of the students at your school attended a student union meeting and 25% of the students attended a faculty meeting. Also, assume that 20% of the total students attended both meetings. What is the probability that a student attended the student union meeting or the faculty meeting?

a.0.10

b.0.25

c.0.35

d.0.55

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Assume a total of 200 students are represented In this Venn diagram. 120 of them are part of the football team, and 100 students are part of the soccer team. How many students are on both teams?

a.20

b.80

c.100

d.120