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15 Cards in this Set
- Front
- Back
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What are two of the four steps of the statistical problem solving process?
1. Ask a question of interest 2. Produce data 3. Analyze data 4. Interpret results |
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In an effort to determine if young children are more artistic when there is a prize for their art work or if having a prize makes no difference at all. Several scientists took a group of 100 or so students and split them in half. They told one group of 50 that the best artwork would receive a prize while they told the second group that when they were done they would have a party. Is this an experiment or an observational study?
An experiment |
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Misko's statistics class wants to know what percentage of students drink diet soda compared to regular soda. Since it would take too long to interview the whole student body (2500) the class decides to interview 250 students. In this instance, which group would be the population and the sample?
The student body is the population and the 250 interviewed is the sample. |
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An environmental safety group meets once a week and most members must drive a considerable distance each day to attend these meetings. In order to help preserve the environment, the leader wanted the entire group to carpool to the meeting with at least one other person. How many members headed his promptings?
20 listened to him, however 12 did not. |
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After a performance, the orchestra planned to go out to eat. However; since they were such a large group (62 people) they needed to order ahead of time. In order to do so a group of 2 members asked every person what they wanted to eat: steak, fish, or pasta? The frequency (number of times each meal was ordered) was also provided. Which one is a qualitative variable? Category or frequency?
Category |
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All of the math teachers at Mauldin high school wanted to know what percentage of students own a ti-84 and what percentage own a ti-89 so that they can teach accordingly. What would be the best approach, an experiment or observational study?
An observational study |
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The senior counselor at a high school took a poll of all high school seniors asking them if they plan to attend collage after high school. 70% answered yes, while 30% answered no. Is this an observational study, survey, or an experiment?
Survey. |
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Researchers interviewed 250 students at a private school to figure out if books or E-readers were more popular. Why could this survey be inaccurate?
Answers may vary: ex. students at a private schools tend to have more money than students in public schools. The E-readers would then more popular with this group. |
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What are the two ways to gather data in section 1?
Through observational study and experiments |
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Would the statement that "the average person takes about 18,000 steps per day" be an accurate statistic?
Yes |
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A group of researchers wanted to know what month is most popular for births, so they looked back over birth certificates of the past year. What type of study is this?
Observational study |
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A group of students at a middle school took a survey to see which eye color is more common: blue, brown, green. The results were, blue: 35%, brown: 40%, and green at 25%. For this example, what would be a reasonable question of interest?
What is the most common eye color for this middle school? |
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An elementary science class preformed a study determining which object would fall faster from a height of 20 feet, a rock or a sheet of paper. Explain why this would be classified as an experiment.
Because they were "deliberately imposing some treatment on individuals in order to observe their responses" |
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Why can it be important in an observational study for the people to be unaware that they are being included in a study?
They may change the way they would usually act thus rendering the study inaccurate. |
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Misko takes a poll of his third period statistics class to determine how many of them did their homework. Since it is a relatively small class, each student is asked. 45% of them completely finished, while 55% either did not do it or did not complete it. What type of survey is this?
Census |
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