Researcher believe that 75% of students (or more) can benefit from listening to music while studying for an exam. To verify this, they recruited 120 high school students from different grade levels (Freshmen to Senior) to participate in a study. The students were asked to take a test immediately after they studied a new subject in a room for three hours. The researchers asked students to repeat the process two times: once without listening to music and another time while listening to their preferred music. The order of the tests (with or without music) and the subjects were randomly assigned. The researchers recorded the difference between with-music and without-music scores to measure the impact of listening to music on score. In addition to the above information, they recorded students' gender. 7. Fill in the following blanks with all applicable variables from the information provided above. The response variable in this study is a. , which is a b. variable. The explanatory variables are c. . Gender is an example of a d. variable. A case in this study is e. and there are f. cases in the dataset. The population of interest is g. and the sample used in the study is h. . 8. If 77 of the students scored better in the test that they prepared for while listening to music, find the proportion of students who can benefit from listening to music. 9. True or False: The value “75%” stated in the problem is a statistic. 10.True or False: The value “75%” stated in the problem is a parameter.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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Researcher believe that 75% of students (or more) can benefit from listening to music while studying for an exam. To verify this, they recruited 120 high school students from different grade levels (Freshmen to Senior) to participate in a study. The students were asked to take a test immediately after they studied a new subject in a room for three hours. The researchers asked students to repeat the process two times: once without listening to music and another time while listening to their preferred music. The order of the tests (with or without music) and the subjects were randomly assigned. The researchers recorded the difference between with-music and without-music scores to measure the impact of listening to music on score. In addition to the above information, they recorded students' gender. 7. Fill in the following blanks with all applicable variables from the information provided above. The response variable in this study is a. ________, which is a b. ________ variable. The explanatory variables are c. ________. Gender is an example of a d. ________ variable. A case in this study is e. ________ and there are f. ________ cases in the dataset. The population of interest is g. ________ and the sample used in the study is h. ________. 8. If 77 of the students scored better in the test that they prepared for while listening to music, find the proportion of students who can benefit from listening to music. 9. True or False: The value “75%” stated in the problem is a statistic. 10.True or False: The value “75%” stated in the problem is a parameter.

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