20. On average, how many of the 20 cocaine users with a small frontal lobe would you expect to be addicted to cocaine?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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Researchers at the University of Cambridge have been studying how brain shape is linked to cocaine addiction. They determined that sporadic cocaine
users (non-addicts) tend to have a larger frontal lobe (region associated with self-control) while cocaine addicts have a small frontal lobe. It was
determined that a cocaine user with a small frontal lobe had a probability equal to 0.7 of becoming addicted to the drug. Researchers conducted a
simple random sample of 20 independent cocaine users that had a small frontal lobe.
Transcribed Image Text:Researchers at the University of Cambridge have been studying how brain shape is linked to cocaine addiction. They determined that sporadic cocaine users (non-addicts) tend to have a larger frontal lobe (region associated with self-control) while cocaine addicts have a small frontal lobe. It was determined that a cocaine user with a small frontal lobe had a probability equal to 0.7 of becoming addicted to the drug. Researchers conducted a simple random sample of 20 independent cocaine users that had a small frontal lobe.
20. On average, how many of the 20 cocaine users with a small frontal lobe would you expect to be addicted to cocaine?
Transcribed Image Text:20. On average, how many of the 20 cocaine users with a small frontal lobe would you expect to be addicted to cocaine?
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