Topic: Making Inferences & Justifying Conclusions

Quiz by PARCC

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Measures 2 skills from

HSS.IC.A.2

HSS.IC.B.3

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Q 1/3
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A circular spinner is divided into five sectors of different colors. A student spun the arrow on the spinner 200 times and recorded that the arrow stopped on the orange sector 38 times out of the 200 spins. To test whether the spinner was fair, the student used a computer to simulate the number of times the arrow stops on orange in 200 spins of a fair spinner equally divided into five sectors of different colors. The results of 1,000 trials of the simulation are shown. Based on the results of the simulation, is there statistical evidence that the spinner is not fair?
29
No, because the distribution is approximately normal.
No, because an outcome of 38 or less is not unusual.
Yes, because about 8% of the outcomes were 38.
Yes, because 38 was the most frequent outcome.

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3 questions

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Q1
A circular spinner is divided into five sectors of different colors. A student spun the arrow on the spinner 200 times and recorded that the arrow stopped on the orange sector 38 times out of the 200 spins. To test whether the spinner was fair, the student used a computer to simulate the number of times the arrow stops on orange in 200 spins of a fair spinner equally divided into five sectors of different colors. The results of 1,000 trials of the simulation are shown. Based on the results of the simulation, is there statistical evidence that the spinner is not fair?
No, because the distribution is approximately normal.
No, because an outcome of 38 or less is not unusual.
Yes, because about 8% of the outcomes were 38.
Yes, because 38 was the most frequent outcome.
60s
HSS.IC.A.2
Q2
The manager of food services at a local high school is interested in assessing student opinion about a new lunch menu in the school cafeteria. The manager is planning to conduct a sample survey of the student population. Which of the listed methods of sample selection would be the 'most' effective at reducing bias?
Randomly select 30 students from a list of all the students in the school.
Randomly select one day of the week and then select the first 30 students who enter the cafeteria on that day.
Randomly select one classroom in the school and then select the first 30 students who enter that classroom.
Post the survey on the school Web site and use the first 30 surveys that are submitted.
60s
HSS.IC.B.3
Q3
The manager of food services at a local high school is interested in assessing student opinion about a new lunch menu in the school cafeteria. The manager is planning to conduct a sample survey of the student population. The manager wants to know if a student's gender is related to the student's opinion about the menu. Which statement 'best' describes the study?
This is an experimental study, and therefore, the manager will be able to establish a cause-and-effect relationship between gender and opinion.
This is an observational study, and therefore, the manager will be able to establish a cause-and-effect relationship between gender and opinion.
This is an experimental study, and therefore, the manager will not be able to establish a cause-and-effect relationship between gender and opinion.
This is an observational study, and therefore, the manager will not be able to establish a cause-and-effect relationship between gender and opinion.
60s
HSS.IC.B.3

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