Unit 5 Practice Test 1

Which data set is represented by the dot plot?

• 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
• 2, 3, 5, 5, 6, 7, 7, 7, 8, 9, 10, 11, 11
• 2, 3, 5, 5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 11, 11
• 2, 3, 4, 4, 4, 7, 7, 7, 8, 8, 9, 9, 10, 11, 11

Which points in the data set below are outliers?
73, 73, 74, 75, 75, 75, 77, 77, 77, 77, 78, 78, 89, 90

• 73, 73
• 73, 73, 74
• 78, 78, 89, 90
• 89, 90

What is the interquartile range of the data set?
16, 18, 18, 19, 20, 21, 23, 24, 25, 26, 27, 27, 27, 29, 29, 30

• 7.5
• 19.5
• 24.5
• 27

Suppose a probability distribution is represented by a histogram. Furthermore, suppose you can draw a vertical line through the histogram that divides the histogram into two parts that are mirror images. Which word is used to describe this distribution?

• binomial
• skewed left
• skewed right
• symmetric

The table below shows the scores from a test in Ms. Powanda's Algebra 1 class.
If she were to eliminate the outlier in her data, what would happen to the mean and median of her test scores?

• The mean will be higher, but the median will stay the same
• The mean and median will be higher
• The mean will stay the same, but the median will be higher
• The mean and the median will not change

What is the mean absolute deviation of:
64.2, 68.1, 55.7, 59.2, 48.3, 54.7, and 77.3?
*Hint Round your Mean 1 decimal Place*

• 6.1
• 7.5
• 8.8
• 52.8

Mrs. Grant gave the same math test to her first and second period classes. These box-and-whisker plots show how a sample of 11 students from each class scored on the test.
Which statement about the variability of the data for the two samples is true?

• The variability for both classes is the same.
• The data for the first period class shows greater variability
• The data for the second period class shows greater variability.
• The variability cannot be determined without knowing the mean scores.

Ben is collecting data about high schools in the Atlanta area. The data on which of these variables would be considered to be quantitative data?

• School Colors
• Size of student body
• Extracurricular activities
• Gender of the principal

The following histogram pictures the number of students who visited the Career Center each week during the school year. The shape of this graph could best be described as...

• Bi-modal
• Skewed Left
• Uniform
• Skewed Right

Describe the shape of the data when the mean and the median are the same value

• Skewed Left
• Skewed Right
• Symmetric
• Bi-Modal