
Stats Review
Authored by Joseph Marichal
Mathematics
9th - 12th Grade
Used 5+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Can pleasant aromas help a student learn better? Two researchers believed that the presence of a floral scent could improve a person’s learning ability in certain situations. They had 22 people work through a pencil-and-paper maze six times, three times while wearing a floral-scented mask and three times wearing an unscented mask. The three trials for each mask closely followed one another. Testers measured the length of time it took subjects to complete each of the six trials. They reported that, on average, subjects wearing the floral-scented mask completed the maze more quickly than those wearing the unscented mask, although the difference was not statistically significant. This study is
an experiment
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
An amateur gardener decides to change varieties of tomatoes for this year to see if the yield is improved. He puts 6 of the old type of tomato plants and 6 of the new tomato plants in his garden. The average yield for the old plants was 11.3 pounds and the average for the new plants was 14.5 pounds. This is an example of
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
210 college students were randomly assigned to play either a violent or nonviolent video game. A short time later, the students were presented with the opportunity to trivially harm another person and results comparing the two groups were recorded.
Is this study OBSERVATIONAL or EXPERIMENTAL?
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A study is conducted to investigate the relationship between owning pets and happiness. 100 subjects are randomly selected and data on whether or not a pet is owned and a happiness score (1‐10, 10 being extremely happy) are obtained.
Is this an OBSERVATIONAL or EXPERIMENTAL study?
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
The Empirical (68-95-99.7) Rule can be applied only if data is ....
Normally Distributed
Uniform
Skewed
Symmetric
7.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Between what two standard deviations of a normal distribution contain 68% of the data?
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