A worker at the local Department of Motor Vehicles (DMV) claims that 60% of teenagers smile in their driver's license photo. In a random sample of 10 teenagers from last month's new driver's licenses, only 4 of them were smiling in their photos. To see how unusual this sample is, 100 simulated trials were conducted under the assumption that 60% of teenagers smile for their driver's license photo. Driver's Licenses 25 20 15 10 3 4 5 6 7 8 9 10 Number of Smiles Based on the dotplot of the simulation results and the random sample from last month's new driver's licenses, which conclusion can be drawn? O The actual proportion of teenagers who do not smile is only 8%. O It is clear that exactly 6 out of 10 teenagers will smile in their driver's license photo. O It we continued to take more samples of 10 teenagers, the center of the distribution would shift to 6. O There is about an 8% chance that 4 or fewer teenagers smiled for their photo. This is not unusual and is not convincing evidence that the true probability is less than 60%. kouanbai
A worker at the local Department of Motor Vehicles (DMV) claims that 60% of teenagers smile in their driver's license photo. In a random sample of 10 teenagers from last month's new driver's licenses, only 4 of them were smiling in their photos. To see how unusual this sample is, 100 simulated trials were conducted under the assumption that 60% of teenagers smile for their driver's license photo. Driver's Licenses 25 20 15 10 3 4 5 6 7 8 9 10 Number of Smiles Based on the dotplot of the simulation results and the random sample from last month's new driver's licenses, which conclusion can be drawn? O The actual proportion of teenagers who do not smile is only 8%. O It is clear that exactly 6 out of 10 teenagers will smile in their driver's license photo. O It we continued to take more samples of 10 teenagers, the center of the distribution would shift to 6. O There is about an 8% chance that 4 or fewer teenagers smiled for their photo. This is not unusual and is not convincing evidence that the true probability is less than 60%. kouanbai
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:A worker at the local Department of Motor Vehicles
(DMV) claims that 60% of teenagers smile in their
driver's license photo. In a random sample of 10
teenagers from last month's new driver's licenses,
only 4 of them were smiling in their photos. To see
how unusual this sample is, 100 simulated trials
were conducted under the assumption that 60% of
teenagers smile for their driver's license photo.
Driver's Licenses
25
20
15
4 5 6 7 8 9 10
3
Number of Smiles
Based on the dotplot of the simulation results and
the random sample from last month's new driver's
licenses, which conclusion can be drawn?
O The actual proportion of teenagers who do not
smile is only 8%.
O Itis clear that exactly 6 out of 10 teenagers will
smile in their driver's license photo.
O I f we continued to take more samples of 10
teenagers, the center of the distribution would
shift to 6.
O There is about an 8% chance that 4 or fewer
teenagers smiled for their photo. This is not
unusual and is not convincing evidence that the
true probability is less than 60%.
Frequency
10
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