Homework Answers
The correlation coefficient of -0.6 means that weight decreases as daily intake of vegetables and fruits increases.
Option 2 is correct.
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QUESTION 10 A study on diet and weight found that the correlation coefficient between weight and...
A study on diet and weight found that the correlation coefficient between weight and daily serving...
A study on diet and weight found that the correlation coefficient between weight and daily serving of vegetables and fruits is -0.6. Does this mean A - weight decreases as daily intake of vegetables and fruits increase? or B - lower intake of vegetables and fruits causes overweight?
A study on diet and weight found that the correlation coefficient between weight and daily serving...
A study on diet and weight found that the correlation coefficient between weight and daily serving of vegetables and fruits is -0.6. What does this mean?
QUESTION 3 True/False. The university study found a positive correlation between the number of weekly course...
QUESTION 3 True/False. The university study found a positive correlation between the number of weekly course log-ins and end of course evaluation scores, r = .16, p = .07. Based on this, it could be concluded that there is significant association between number of log-ins and end of course evaluation scores. True False 10 points QUESTION 4 The correlational finding that test anxiety increases grades decrease is an example of which of the following? A negative correlation. A positive...
You conducted a study and found a correlation coefficient of 0.87 between students’ academic performance and...
You conducted a study and found a correlation coefficient of 0.87 between students’ academic performance and taking classes online. a) Explain the meaning of this coefficient in terms of association and strength. b) What would be the next statistical action after interpreting the coefficient:
A study indicates the correlation coefficient between salt intake and blood pressure is 0.8. If we...
A study indicates the correlation coefficient between salt intake and blood pressure is 0.8. If we plot the data points using salt intake as X axis, and blood pressure as Y axis. What will show on the plot? 1. The data points are clustered close to a line that slopes down to the right 2. The data points are clustered close to a line that slopes up to the right 3. The data points are scattered around a line that...
1: Which correlation coefficient best describes the relationship between height and weight in healthy individuals across...
1: Which correlation coefficient best describes the relationship between height and weight in healthy individuals across ages 12 to 80? 2: What does a correlation coefficient of 1.0 mean? that no relationship exists between two sets of scores that those who did the best on the first test did the worst on the second test that those who did the best on the first test were average on the second test that those who did the best on the first...
Problem 7 (10 marks) Researchers studying the effects of a new diet found that the weight...
Problem 7 (10 marks) Researchers studying the effects of a new diet found that the weight loss over a one- month period by those on the diet was normally distributed with a mean of 10 pounds and a standard deviation of 5 pounds. a) What proportion of the dieters lost less than 3 pounds? (3 marks) b) What proportion of the dieters lost weight? (4 marks) c) What is the cut-off for the top 5% weight loss? (3 marks)
Problem 7 (10 marks) Researchers studying the effects of a new diet found that the weight...
Problem 7 (10 marks) Researchers studying the effects of a new diet found that the weight loss over a one- month period by those on the diet was normally distributed with a mean of 12 pounds and a standard deviation of 5 pounds. a) What proportion of the dieters lost more than 10 pounds? (3 marks) b) What proportion of the dieters gained weight? (4 marks) c) What is the cut-off for the top 1% weight loss? (3 marks)
2. What is the coefficient of correlation between miles per gallon and weight? What is the...
2. What is the coefficient of correlation between miles per gallon and weight? What is the sign of the correlation coefficient? Does the coefficient of correlation indicate a strong correlation, weak correlation, or no correlation between the two variables? How do you know? See Step 3 in the Python script. 3. Write the simple linear regression equation for miles per gallon as the response variable and weight as the predictor variable. How might the car rental company use this model?...
10. Suppose that an extensive study found that the weight loss in pounds after following a...
10. Suppose that an extensive study found that the weight loss in pounds after following a certain diet is normal with σ= 5.7 pounds. A new modification of the diet has been implemented and a random sample of 21 people use the modified diet for 6 months. For these people, the sample standard deviation of weight loss is 4.1 pounds. Does this result indicate that the variance of the weight loss for the modified diet is different? Use a significance...
Problem 7 (10 marks) Researchers studying the effects of a new diet found that the weight loss over a one- month period by those on the diet was normally distributed with a mean of 10 pounds and a standard deviation of 5 pounds. a) What proportion of the dieters lost less than 3 pounds? (3 marks) b) What proportion of the dieters lost weight? (4 marks) c) What is the cut-off for the top 5% weight loss? (3 marks)
Problem 7 (10 marks) Researchers studying the effects of a new diet found that the weight loss over a one- month period by those on the diet was normally distributed with a mean of 12 pounds and a standard deviation of 5 pounds. a) What proportion of the dieters lost more than 10 pounds? (3 marks) b) What proportion of the dieters gained weight? (4 marks) c) What is the cut-off for the top 1% weight loss? (3 marks)
2. What is the coefficient of correlation between miles per gallon and weight? What is the sign of the correlation coefficient? Does the coefficient of correlation indicate a strong correlation, weak correlation, or no correlation between the two variables? How do you know? See Step 3 in the Python script. 3. Write the simple linear regression equation for miles per gallon as the response variable and weight as the predictor variable. How might the car rental company use this model?...
10. Suppose that an extensive study found that the weight loss in pounds after following a certain diet is normal with σ= 5.7 pounds. A new modification of the diet has been implemented and a random sample of 21 people use the modified diet for 6 months. For these people, the sample standard deviation of weight loss is 4.1 pounds. Does this result indicate that the variance of the weight loss for the modified diet is different? Use a significance...
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