AnswersAdvanced Algebra Concepts and ConnectionsDescriptive and Inferential Statistics

Descriptive and Inferential Statistics — Test Answers

25 verified answers
21
Free Preview

Sonia rolls a six-sided number cube 12 times and records if she rolls a 2. What is the number of trials for this binomial experiment?

A
2
B
18
C
6
D
12
22
Free Preview

Dwayne and Alisha both correctly graphed a standard normal curve. Which of the following statements is true?

A
Neither the means nor the standard deviations of Dwayne’s and Alisha’s graphs must be the same.
B
The means of Dwayne’s and Alisha’s graphs must be the same but not the standard deviations.
C
Both the means and the standard deviations of Dwayne’s and Alisha’s graphs must be the same.
D
The standard deviations of Dwayne’s and Alisha’s graphs must be the same but not the means.
23

The scores of the students on a standardized test are normally distributed, with a mean of 500 and a standard deviation of 110. What is the probability that a randomly selected student has a score between 350 and 550? Use the portion of the standard normal table to help answer the question. z Probability 0 point 0 0 0 point 5 0 0 0 0 point 2 5 0 point 5 9 8 7 0 point 3 5 0 point 6 3 6 8 0 point 4 5 0 point 6 7 3 6 1 point 0 0 0 point 8 4 1 3 1 point 2 6 0 point 8 9 6 1 1 point 3 5 0 point 9 1 1 5 1 point 3 6 0 point 9 1 3 1

A
91 percent
B
24 percent
C
59 percent
D
9 percent
24

Which statement is true about the data set?

A
The data is symmetric.
B
Its median is greater than its mode.
C
The value of the first quartile is 13.
D
It has a range of 52 pages.
25

How could the graph be redrawn so that the difference in monthly electric cost does not appear as great?

A
The scale on the y -axis could be changed to 100 - 120 .
B
The scale on the y -axis could be changed to 0 - 150 .
C
The interval on the y -axis could be changed to count by 1 s.
D
The interval on the y -axis could be changed to count by 20 s.

Did you find these answers helpful?

More from this Course

practice test
18 verified answers

Practice Test

practice test
12 verified answers

Practice Test

practice test
6 verified answers

Practice Test

Descriptive and Inferential Statistics — Test…