Statistics (SOPHIA)
University Of Alabama - Tuscaloosa
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Exam (elaborations)
SOPHIA_UNIT_4_STATISTICS_MILESTONE_UPDATED 2022/2023 | SOPHIA_UNIT_4_STATISTICS_MILESTONE_Graded A+
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--16March 20212022/2023A+
- UNIT 4 — MILESTONE 4 
Score 17/18 
You passed this Milestone 
17 questions were answered correctly. 
1 question was answered incorrectly. 
1 
This scatterplot shows the maintenance expense for a truck based on its years of service. 
The equation for least regression line to this data set is ŷ = 76.82x + 88.56. 
What is the predicted value (in dollars) for maintenance expenses when a truck is 7 years old? 
$626 
$703 
$473 
$549 
RATIONALE 
In order to get the predicted maintenance expense whe...
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$15.49 More Info
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Exam (elaborations)
SOPHIA_UNIT_3_STATISTICS_MILESTONE_2020 | SOPHIA_UNIT_3_STATISTICS_MILESTONE_Graded A
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---7March 20212020/2021A
- UNIT 3 — MILESTONE 3 
Score 25/27 
You passed this Milestone 
25 questions were answered correctly. 
2 questions were answered incorrectly. 
1 
Zhi and her friends moved on to the card tables at the casino. Zhi wanted to figure out the probability of drawing a black Queen or a black Jack. 
Choose the correct probability of drawing a black Queen or a black Jack. Answer choices are in the form of a percentage, rounded to the nearest whole number. 
15% 
8% 
25% 
4% 
RATIONALE 
Since the two event...
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$13.49 More Info
Academiks
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Exam (elaborations)
SOPHIA_UNIT_1_STATISTICS_MILESTONE_2020 | SOPHIA_UNIT 1 _ MILESTONE 1_Graded A
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--16March 20212020/2021A
- UNIT 1 — MILESTONE 1 
Score 24/29 
You passed this Milestone 
24 questions were answered correctly. 
5 questions were answered incorrectly. 
1 
A research team conducts a survey to determine the area of land used for farming in Iowa. The team randomly selects house addresses and sends the survey by mail. 
Which type of sampling method is the research team using? 
Systematic random sampling 
Cluster sampling 
Multi-stage sampling 
Simple random sampling 
RATIONALE 
By choosing randomly from the...
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$12.49 More Info
Academiks