20.7
20.7 Does background music influence the scores of college students on a reading comprehension test? Sets of 10 randomly selected students take a reading comprehension test with rock, country-western, or classical music in the background. The results are as follows (higher scores reflect better comprehension)
(a) Why might the H test be preferred to the F test for these data?
(b) Use H to test the null hypothesis at the .05 level of significance
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A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete...
A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete a reading comprehension task before and after a six-week speed reading course. In the beginning of the study, a randomly selected group of B1 students scored an average of 102 points on the reading comprehension task. Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M_D is normal. He plans to use a repeated-measures t-test....
Hallam, Price, and Katsarou (2002) investigated the influence of background noise on classroom performance for children...
Hallam, Price, and Katsarou (2002) investigated the influence of background noise on classroom performance for children aged 10-12. In one part of the study, calming music led to better performance on an arithmetic task compared to a no-music condition. Suppose that a researcher selects one class of 18 students who listen to calming music each day, while a second class of 18 students serves as a control group with no music. Accuracy scores are measured for each child. Which hypothesis...
LLLLLS. 6. A one-tailed hypothesis test for a repeated-measures design Here to learn more. Aa Aa...
LLLLLS. 6. A one-tailed hypothesis test for a repeated-measures design Here to learn more. Aa Aa E A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete a reading comprehension task before and after a six-week speed-reading course In the beginning of the study, a randomly selected group of 81 students scored an average of 102 points on the reading comprehension task. Since the sample size is larger than 30, the cognitive psychologist can...
Elmo likes music. He wondered if listening to music while studying will improve scores on an...
Elmo likes music. He wondered if listening to music while studying will improve scores on an exam. Fifty students who were to take the midterm in a week agreed to be part of a study. Half were randomly assigned to listen to classical music while studying for the exam. The other half were told not to listen to any music while studying for the exam. A hypothesis test is to be performed to determine if the average score of those...
Attention: Due to a bug in Google Chrome, this page may not function correctly. Click here...
Attention: Due to a bug in Google Chrome, this page may not function correctly. Click here to learn more 3. A one-tailed hypothesis test for a repeated-measures design Aa Aa E A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete a reading comprehension task before and after a six-week speed-reading course In the beginning of the study, a randomly selected group of 81 students scored an average of 102 points on the reading...
Large Data Set 1 records the GPAs of 1,000 college students. Regarding it as a random sample of a...
Large Data Set 1 records the
GPAs of 1,000 college students. Regarding it as a random sample of
all college students, use it to test the hypothesis that the
population mean is less than 2.50, at the 10% level of
significance. (The null hypothesis is that μ = 2.50.)
Note: All of the data sets associated with these questions are missing, but the questions themselves are included here for reference 22. Large Data Set 1 records the GPAs of 1,000...
Steven collected data from 20 college students on their emotional responses to classical music
Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from “The Collection from the Best of Classical Music.” After listening to a segment, the students rated it on a scale from 1 to 10, with 1 indicating that it “made them very sad” to 10 indicating that it “made them very happy.” Steve computes the total scores from each student and created a variable called “hapsad.” Steve then conducts...
6. You are curious if two types of music, classical or rock, have different effects on...
6. You are curious if two types of music, classical or rock, have different effects on the ability of college students to perform a series of mental tasks requiring concentration. You gather two groups of participants and have them perform a series of tasks while listening to music and record the number of errors they make in completing the tasks. Group 1 listens to classical music and Group 2 listens to rock. You believe classical music will have a more...
The data below shows the age and favorite type of music of 779 randomly selected people....
The data below shows the age and favorite type of music of 779 randomly selected people. Age 15-21 21-30 30-40 40-50 Country Rock Pop Classical 21 45 90 33 68 55 42 48 65 31 57 60 39 25 53 Test the claim that preferred music type is dependent on age. Use a = 0.05.
Chap 13 Susan Sound wants to know if constant background sound, as opposed to an unpredictable...
Chap 13 Susan Sound wants to know if constant background sound, as opposed to an unpredictable sound or no sound at all, effects how students learn. She randomly divides twenty-four students into three groups of eight. All students study a passage of text for 30 minutes. Those in group 1 study with background sound at a constant volume in the background. Those in group 2 study with noise that changes volume periodically. Those in group 3 study with no sound...
A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete a reading comprehension task before and after a six-week speed reading course. In the beginning of the study, a randomly selected group of B1 students scored an average of 102 points on the reading comprehension task. Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M_D is normal. He plans to use a repeated-measures t-test....
LLLLLS. 6. A one-tailed hypothesis test for a repeated-measures design Here to learn more. Aa Aa E A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete a reading comprehension task before and after a six-week speed-reading course In the beginning of the study, a randomly selected group of 81 students scored an average of 102 points on the reading comprehension task. Since the sample size is larger than 30, the cognitive psychologist can...
Attention: Due to a bug in Google Chrome, this page may not function correctly. Click here to learn more 3. A one-tailed hypothesis test for a repeated-measures design Aa Aa E A cognitive psychologist is interested in whether increasing reading speed improves comprehension. He has students complete a reading comprehension task before and after a six-week speed-reading course In the beginning of the study, a randomly selected group of 81 students scored an average of 102 points on the reading...
Large Data Set 1 records the
GPAs of 1,000 college students. Regarding it as a random sample of
all college students, use it to test the hypothesis that the
population mean is less than 2.50, at the 10% level of
significance. (The null hypothesis is that μ = 2.50.)
Note: All of the data sets associated with these questions are missing, but the questions themselves are included here for reference 22. Large Data Set 1 records the GPAs of 1,000...
The data below shows the age and favorite type of music of 779 randomly selected people. Age 15-21 21-30 30-40 40-50 Country Rock Pop Classical 21 45 90 33 68 55 42 48 65 31 57 60 39 25 53 Test the claim that preferred music type is dependent on age. Use a = 0.05.
Chap 13 Susan Sound wants to know if constant background sound, as opposed to an unpredictable sound or no sound at all, effects how students learn. She randomly divides twenty-four students into three groups of eight. All students study a passage of text for 30 minutes. Those in group 1 study with background sound at a constant volume in the background. Those in group 2 study with noise that changes volume periodically. Those in group 3 study with no sound...
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