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Sophia Foundations of Statistics Unit 1 Milestone 1.
- Exam (elaborations) • 21 pages • 2024
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Two drains in Bill's house were clogged. After considering the selection of drain cleaners at the hardware store, 
Bill chose a brand that claimed to be effective with just one use. Back at home, Bill eventually had to use the 
cleaner three times before the drains cleared, but he was still satisfied with the product. 
Which of the following correctly describes the sample? 
The number of drains the product's manufacturer tested 
The products Bill chose 
4/21/2020 Sophia :: Welcome 

All of the...
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Sophia Foundations of Statistics Unit 1 Milestone 1.
- Exam (elaborations) • 21 pages • 2023
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- $15.49
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received eight different quotes: 
$27,345 $26,780 $27,345 $29,785 
$26,450 $29,480 $26,700 $26,995 
What is the average car price? 
$27,607 
$28,415 
$27,610 
$27,345 
RATIONALE 
The average, or mean, is found by adding all the values and dividing by the number of data points, in this case, 
eight different quotes. 
($27,345 + $26,780 + $27,345 + $29,785 + $26,450 + $29,480 + $26,700 + $26,995) / 8 = $220,880 / 8 = 
$27,610. 
CONCEPT 
Calculating the
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Sophia Foundations of Statistics Unit 1 Milestone 1
- Exam (elaborations) • 13 pages • 2023
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- $15.49
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16 questions were answered correctly. 
4 questions were answered incorrectly. 
1 
Sarah wanted to review what others thought of a new video game she was interested in before 
she purchased it. She noticed that on the website from a large online retailer, the game received 
an overall rating of 4.5 stars. 
Which of the following is an example of selection bias? 
 
Sarah reviews several different star ratings to get a sense of what all users thought about the 
game. 
 
Sarah only reads the 5...
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