QUESTION 1

1. A set of all possible data values for a subject under consideration is called ___.
2. descriptive statistics
3. a sample
4. a population
5. inferential statistics

5 points

QUESTION 2

1. Which of the following can be classified as Discrete and Quantitative data.
2. The acceleration of your car as you drive to school.
3. The different colors of the eyes of your classmates.
4. The number of students in your school.
5. The height of all the people in your neighborhood.

5 points

QUESTION 3

1. Can a frequency distribution have overlapping classes?
2. Sometimes
3. No
4. Yes
5. Can’t determine. I need more information.

5 points

QUESTION 4

1. For a 10 point quiz, the professor recorded the following scores for 8 students:
2. 7, 8, 3, 9, 10, 6, 8, 5
3. What is the Mean for this set of scores?
4. 7.0
5. 6.9
6. 7.5
7. 8.0

5 points

QUESTION 5

1. What type of distribution is described by the following information?
2. Mean = 56          Median = 58.1  Mode = 63
3. (Left) negatively skewed
4. Symmetrical (Normal)
5. Bimodal
6. Right (positively) skewed

5 points

QUESTION 6

1. In a standardized IQ test, the mean score is 100 and the standard deviation is 15. According to the Empirical rule, 95 % of all those who took the test should have scores between
2. 70 & 130
3. 85 & 115
4. 55 & 145
5. 100 & 130

5 points

QUESTION 7

1. A Statistics teacher has the following test scores : 93, 72, 80, 95, 90, 70, 91, 85, 86, 100 What is the median test score of these grades?
2. 90
3. 88
4. 95
5. 80

5 points

QUESTION 8

1. There are 10 colored balls in a box ( 5 red, 3 blue, 2 green ). What is the probability of picking out a red ball and then a blue ball ( If I do not replace the red ball )?
2. 1/6
3. 1/2
4. 3/20
5. 4/5

QUESTION 10

1. If I go into an ice cream parlor, and I have the choice of having one of 10 different flavors, with one of 5 different toppings and one of 3 different types of cones, How many times can I come back to this place and get a different ice cream cone combination?
2. 10
3. 50
4. 150
5. 300

QUESTION 12

1. The area under a normal curve distribution is
2. Equal to 100
3. almost equal to 1
4. equal to 1
5. equal to .5

5 points

QUESTION 13

1. According to the Central Limit Theorem, The traditional sample size that separates a large sample size from a small sample size is one that is greater than
2. 100
3. 30
4. 500
5. 20

5 points

QUESTION 14

1. Consider a binomial random variable where the number of trials is 12 and the probability of success on each trial is 0.25. Find the mean and standard deviation of this random variable.
2. Mean = 3 , Standard Deviation = 1.5
3. Mean = 4 , Standard Deviation = 2.25
4. Mean = 6 , Standard Deviation = 2.25
5. Mean = 9 , Standard Deviation = 1.5

5 points

QUESTION 15

1. What is the probability you will get a question right in this quiz, if I only give you 3 possible answers, one choice is the correct one and you randomly choose an answer?
2. 1/3
3. 1/2
4. 1/4