Question

In: Statistics and Probability

In a study conducted to determine the role that sleep disorders play in academic performance, researcher...

In a study conducted to determine the role that sleep disorders play in academic performance, researcher Jane Gaultney conducted a survey of 1845 college students to determine if they had a sleep disorder (such as narcolepsy, insomnia, or restless leg syndrome). Of the 503 students with a sleep disorder, the mean grade point average was 2.65 with a standard deviation of 0.87. Of the 1342 students without a sleep disorder, the mean grade point average was 2.82 with a standard deviation of 0.83. Is there evidence to suggest sleep disorders adversely affect one’s GPA at the a = 0.05 level of significance?

Solutions

Expert Solution



Related Solutions

Problem: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study...
Problem: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study in which four participants were instructed to count sheep (the Sheep Condition), four were told to concentrate on their breathing (the Breathing Condition), and four were not given any special instructions. The average number of minutes taken for each participant to fall asleep over the next seven days were 14, 28, 27, and 31 minutes for the Sheep condition; 25, 22, 17, and 14...
In an obesity study, a researcher wishes to determine if age, average sleep duration, and depression...
In an obesity study, a researcher wishes to determine if age, average sleep duration, and depression score have any effect on a person’s weight. The researcher takes a random sample of 25 participants that have been diagnosed as obese and records their measurements. Using the data, create the regression output (not including the y-intercept) then answer the questions below. Note that all variables are quantitative. Let α = 0.05. Write out the estimated regression line. To receive full credit, you...
A sleep researcher conducted a study where 4 participants were instructed to count sheep and 4...
A sleep researcher conducted a study where 4 participants were instructed to count sheep and 4 were told to concentrate on their breathing and 4 were not given any special instruction. The average number of minutes taken for each participants to fall asleep over the next 7 days were 14, 18, 27, 31 minutes for the sheep counters. 25, 22, 17, 14 minutes for the breathing ones, and 45, 33, 30, and 41 for the control condition. using the .05...
A researcher conducted a test to determine how sleep influenced learning. He had three conditions: normal...
A researcher conducted a test to determine how sleep influenced learning. He had three conditions: normal sleep, reduced sleep, and no sleep. Mean performance scores for the Normal Sleep, Reduced Sleep, and No Sleep groups were 18.0, 16.6, and 15.6, respectively. His F ratio was 0.97. Therefore, he concluded that those who sleep perform better than those who have reduced sleep, who perform better than those with no sleep. List two problems with this scenario, why are they problems.
Researcher conducts a study to decide whether support groups improve academic performance for at-risk high school...
Researcher conducts a study to decide whether support groups improve academic performance for at-risk high school students. Ten such students are randomly selected to take part in the support group for a semester, while the other 10 at-risk students serve as a control group. At the end of the semester, the improvement in GPA versus the previous semester is recorded for each student. Support Group: 0.5, 0.8, 0.7, 0.7, -0.1, 0.2, 0.4, 0.4, 0.5, 0.4 Control Group: -0.3, 0.0, -0.1,...
An educational researcher wishes to know if there is a difference in academic performance for college...
An educational researcher wishes to know if there is a difference in academic performance for college freshmen that live on campus and those that commute. Data was collected from 214214 students. Can we conclude that freshman housing location and academic performance are related? Location Average Below Average Above Average Total On campus 7777 4242 3939 158158 Off campus 2828 1414 1414 5656 Total 105105 5656 5353 214214 Copy Data Step 1 of 8 :   State the null and alternative hypothesis....
An educational researcher wishes to know if there is a difference in academic performance for college...
An educational researcher wishes to know if there is a difference in academic performance for college freshmen that live on campus and those that commute. Data was collected from 336 students. Can we conclude that freshman housing location and academic performance are related? Location   Average   Below Average   Above Average   Total On campus   99 89 89 277 Off campus   41 10 8 59 Total 140 99 97 336 Step 1 of 8: State the null and alternative hypothesis. Step 2 of...
An educational researcher wishes to know if there is a difference in academic performance for college...
An educational researcher wishes to know if there is a difference in academic performance for college freshmen that live on campus and those that commute. Data was collected from 214214 students. Can we conclude that freshman housing location and academic performance are related? Location Average Below Average Above Average Total On campus 7777 4242 3939 158158 Off campus 2828 1414 1414 5656 Total 105105 5656 5353 214214 Copy Data Step 6 of 8 :   Find the critical value of the...
A researcher is interested in looking at the effect of sleep and caffeine on physical performance....
A researcher is interested in looking at the effect of sleep and caffeine on physical performance. The researcher has each subject perform a series of 6 tests across a number of week. The researcher alters the amount of sleep the subject should receive (8 hours, 6 hours, and 4 hours) while also altering whether they drink coffee in the morning or they do not. These two factors are completely crossed to create the six conditions. Eight subjects were recruited for...
2. Good sleep or bad sleep? ~ A study was conducted to identify the factors affecting...
2. Good sleep or bad sleep? ~ A study was conducted to identify the factors affecting quality of sleep for university students. A survey of 290 students of different majors aged 17-29 years old revealed that 67.2% of these students suffered from poor sleep. a. Create a 95% confidence interval for the = the population proportion of university students aged 17-29 years old who suffer from poor sleep. Final answer: ( ______________________ , _____________________ ) b. Determine whether each of...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT