Calculate the correlation between hours of sleep and exam grade using the data below. Interpret the...
- Calculate the correlation between hours of sleep and exam grade using the data below. Interpret the strength and direction of the correlation.
|
Hours of Sleep |
Exam Grade |
|
7 |
75 |
|
7 |
70 |
|
8 |
80 |
|
8 |
70 |
|
10 |
80 |
Homework Answers
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Calculate the correlation between hours of sleep and exam grade
using the data below. Interpret the...
The table below shows the midterm exam score and the overall grade for a random sample...
The table below shows the midterm exam score and the overall grade for a random sample of 12 students in a statistics course. Calculate the value of the correlation coefficient r between midterm exam scores and overall grades. Give the answer with two decimal places. Midterm exam score Overall grade (v) 50 65 90 80 70 75 80 75 60 45 90 95 80 80 70 65 70 70 60 65 90 85 50 55
In the table below, 4 students' GPA and hours spent on sleep. 3. Hours on Sleep...
In the table below, 4 students' GPA and hours spent on sleep. 3. Hours on Sleep Student ID GPA 4 4 10 3 3 6. 3 4 4 1) Calculate the correlation coefficient. 2) Based on the correlation coefficient, the relationship between GPA and sleep is negative. True/ FALSE. 2 points 3) With alpha = 0.05, can you reject the null hypothesis that there is no relationship between GPA and hours spent on sleep.
You have tested to find whether a relationship exists between hours of sleep the night before...
You have tested to find whether a relationship exists between hours of sleep the night before an exam and grade on the exam, You have a participant pool of n 30, df = 28. more hours of sleep receive higher grades on the exam. This is a directional hypothesis, so you run a one-tailed test, with o 0.05. You run the numbers and find a correlation of 0.243. The critical value from the t-table is Your hypothesis is that a...
Correlation This assignment will examine your ability to analyze the relationship between two variables, create an...
Correlation
This assignment will examine your ability to analyze the relationship between two variables, create an equation for predicting one variable from the other, and to critique the results of the data. You will be given the data for 2 psychological experiments looking at the relationship between variables. For these sets of data you will: (1) use the SPSS program to calculate the correlation and create a scatterplot (2) provide the appropriate output given from the program (3) describe this...
2. Given the following data Xe additional number of studying hours since last exam 2011 Grade...
2. Given the following data Xe additional number of studying hours since last exam 2011 Grade improvement since last enam 2014 a Orawa scatter diagram and speculate on the direction linear relationship between the two variables..Clearly label the 2 axes Find the coefficient of correlation (r) and Comment on it (Please use complete sentences to respond) Compute the coefficient of determination) and tell us what it means (Please use complete sentences to d. Is the correlation significant at alpha 0.067...
The following data is exam score and hours looking at social media in that week of...
The following data is exam score and hours looking at social media in that week of the exam from a sample of 10 students. Student 1 2 3 4 5 6 7 8 9 10 Exam Score 50 67 72 73 79 33 35 36 89 92 Hours 9.5 9.5 8.2 7.8 6.7 5.9 5.5 4.2 1.8 0.1 a) (3 points) Using the IQR rule are there any outliers for the exam scores? If so write down the number(s). Give...
4. The time spent studying for an exam and the result of the exam for a...
4. The time spent studying for an exam and the result of the exam for a random sample of 8 students in an elementary statistics course are shown below. Time (hours) 5 7 5 6 7 10 5 8 Exam's Score 70 80 75 78 75 99 85 90 (a) (6 points) Find the equation of the regression line. Round answers to a whole number. (b) (5 points) Predict the exam's score for a student who studied 6 hours assum-...
The table below gives the number of hours ten randomly selected students spent studyling and their...
The table below gives the number of hours ten randomly selected students spent studyling and their corresponding midterm exam grades. Using this data, consider the equation of the regression line, -bo +bix, for predicting the midterm exam grade that a student will earn based on the number of hours spent studying. Keep in mind, the correlation coefficient may or may not be statistically significant for the data given. Remember, in practice, it would not be appropriate to use the regression...
the data below are the final exam scores of 10 randomly selected statistics students and the...
the
data below are the final exam scores of 10 randomly selected
statistics students and the number of hours they studied for the
exam. What is the best predicted value for the exam score for a
student who stuided 2 hours? Assume that the varibles x and y have
a significant correlation.
Question 10 1 pts The data below are the final exam scores of 10 randomly selected statistics students and the number of hours they studied for the exam....
Grade on Statistics Exam Frequency Below 50 50- 59 60-69 70 - 79 80-89 90- 100...
Grade on Statistics Exam Frequency Below 50 50- 59 60-69 70 - 79 80-89 90- 100 3 10 7 10 19 13 ons Given the frequency table above, construct the following: (a) The relative frequency table that corresponds with the above table. Grade on Statistics Exam Relative Frequency Below 50 50-59 60-69 70-79 80-89 90 100 (b) The cumulative frequency table that corresponds with the above table Grade on Statistics Exam Cumulative Frequency Below s0 50-59 60- 69
The table below shows the midterm exam score and the overall grade for a random sample of 12 students in a statistics course. Calculate the value of the correlation coefficient r between midterm exam scores and overall grades. Give the answer with two decimal places. Midterm exam score Overall grade (v) 50 65 90 80 70 75 80 75 60 45 90 95 80 80 70 65 70 70 60 65 90 85 50 55
In the table below, 4 students' GPA and hours spent on sleep. 3. Hours on Sleep Student ID GPA 4 4 10 3 3 6. 3 4 4 1) Calculate the correlation coefficient. 2) Based on the correlation coefficient, the relationship between GPA and sleep is negative. True/ FALSE. 2 points 3) With alpha = 0.05, can you reject the null hypothesis that there is no relationship between GPA and hours spent on sleep.
You have tested to find whether a relationship exists between hours of sleep the night before an exam and grade on the exam, You have a participant pool of n 30, df = 28. more hours of sleep receive higher grades on the exam. This is a directional hypothesis, so you run a one-tailed test, with o 0.05. You run the numbers and find a correlation of 0.243. The critical value from the t-table is Your hypothesis is that a...
Correlation
This assignment will examine your ability to analyze the relationship between two variables, create an equation for predicting one variable from the other, and to critique the results of the data. You will be given the data for 2 psychological experiments looking at the relationship between variables. For these sets of data you will: (1) use the SPSS program to calculate the correlation and create a scatterplot (2) provide the appropriate output given from the program (3) describe this...
2. Given the following data Xe additional number of studying hours since last exam 2011 Grade improvement since last enam 2014 a Orawa scatter diagram and speculate on the direction linear relationship between the two variables..Clearly label the 2 axes Find the coefficient of correlation (r) and Comment on it (Please use complete sentences to respond) Compute the coefficient of determination) and tell us what it means (Please use complete sentences to d. Is the correlation significant at alpha 0.067...
The following data is exam score and hours looking at social media in that week of the exam from a sample of 10 students. Student 1 2 3 4 5 6 7 8 9 10 Exam Score 50 67 72 73 79 33 35 36 89 92 Hours 9.5 9.5 8.2 7.8 6.7 5.9 5.5 4.2 1.8 0.1 a) (3 points) Using the IQR rule are there any outliers for the exam scores? If so write down the number(s). Give...
4. The time spent studying for an exam and the result of the exam for a random sample of 8 students in an elementary statistics course are shown below. Time (hours) 5 7 5 6 7 10 5 8 Exam's Score 70 80 75 78 75 99 85 90 (a) (6 points) Find the equation of the regression line. Round answers to a whole number. (b) (5 points) Predict the exam's score for a student who studied 6 hours assum-...
The table below gives the number of hours ten randomly selected students spent studyling and their corresponding midterm exam grades. Using this data, consider the equation of the regression line, -bo +bix, for predicting the midterm exam grade that a student will earn based on the number of hours spent studying. Keep in mind, the correlation coefficient may or may not be statistically significant for the data given. Remember, in practice, it would not be appropriate to use the regression...
the
data below are the final exam scores of 10 randomly selected
statistics students and the number of hours they studied for the
exam. What is the best predicted value for the exam score for a
student who stuided 2 hours? Assume that the varibles x and y have
a significant correlation.
Question 10 1 pts The data below are the final exam scores of 10 randomly selected statistics students and the number of hours they studied for the exam....
Grade on Statistics Exam Frequency Below 50 50- 59 60-69 70 - 79 80-89 90- 100 3 10 7 10 19 13 ons Given the frequency table above, construct the following: (a) The relative frequency table that corresponds with the above table. Grade on Statistics Exam Relative Frequency Below 50 50-59 60-69 70-79 80-89 90 100 (b) The cumulative frequency table that corresponds with the above table Grade on Statistics Exam Cumulative Frequency Below s0 50-59 60- 69
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