Investigation: Memorizing Letters? Can people better memorize letters if they ar

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Investigation: Memorizing Letters? Can people better memorize letters if they are presented in recognizable groupings than if they are not? Students in an introductory statistics class were the subjects in a study that investigated this question. These students were given a sequence of 30 letters to memorize in 20 seconds. Some students (25 of them) were given the letters in recognizable three-letter groupings such as JFK-CIA-FBI-USA-.. The other students (26 of them) were given the exact same letters in the same order, but the groupings recognizable chunks, such as JFKC-IAF-BIU- The instructor decided which students received which grouping by random assignment. After 20 seconds of studying the letters, students recorded as many letters as they could remember. Their score was the number of letters memorized correctly before their first mistake. The instructor conjectured that students in the JFK-CIA-... group would memorize more letters, on average, than students in the JFKC-IAF-... group. varied in size and did not include Step 1: Ask a research question. . State the research question. Step 2: Design a study and collect data 2. Is this an observational study or an experiment? Select one; then explain how you know. B. Observational study 3. Identify the observational units. Select one. A. Letters B. Instructors C. Students D. Scores 4. [2 pts] Circle one answer for each bracket to complete the description of each variable listed: Type of grouping is theree explanatory response e and categorical guantitative Number of letters memorized is the {explanatory} variable and it is [categorical quantitative respose

Explanation / Answer

The following are correct options for first 5 questions

1) peopel can better memorize letters if they are presented in recognizable groupings than if they are not

2) Experiment

3) Letters

4) Explanatory, .......Categorical.........response........quantitative

5) option C is correct

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