myTestBook.com Math Reading Science Practice Test for Grade 1, 2, 3, 4 & 5    
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Grade: 8,    Subject: Math,    Topic: Probability and Statistics Line Chart, Line Plot
See the following text/image to answer questions 1 through 5
Following chart represents defects found in the production of cars in a car company.
 
Question 1:
Which defect is almost constant over the years?

PaintWiring

BreakNone of them
 
Question 2:
Which defect was occurring the least in the year 2001?

BreakWiring

PaintTransmission
 
Question 3:
Which defect continued to worsen over the years?

PaintWiring

BreakNone of them
 
Question 4:
The company applied techniques to improve paint defects. When did they see improvements in the paint defects?

20042005

20062008
 
Question 5:
How much improvement did the company see after they improved paint defects?

Defects reduced to 25%Defects reduced to 200%

Defects reduced to 75%Defects reduced to 50%
 
Question 6:

What is the average number of students selected from each grade?

44.2

4.55
 
Question 7:

Each point in the following line plot represents 1,000 people. How many people are more then 80 years old?

3,0004,000

2,0001,000
 
Question 8:

How many people are older then 60 and younger then 80? (Each point = 1,000 people.)

8,0003,000

5,0004,000
 
Question 9:

Calls received in a customer service department are plotted in the following plot. Each point represents 100 calls. What is the average number of calls during the week?

450600

580725
 
Question 10:

Calls received in a customer service department are plotted in the following plot. Each point represents 100 calls. If one person can handle ~200 calls, how many full time employees should the company hire so that all calls can be handled effectively everyday?

34

156
 
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