or Development Ouer anne-2018s.. Turn in Test EXAM 11- MATH 353 MOLLY MCCULLOUGH

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or Development Ouer anne-2018s.. Turn in Test EXAM 11- MATH 353 MOLLY MCCULLOUGH Question1 of 12 Step 1 of 6 245:08:08 The table below gives the number of hours spent unsupervised each day as well as the overall grade averages for five randomly selected midde school students, Using this data, consider the equation of the regression line,-bo+byx, for predicting the overall grade average for a middlie school student based on the number of hours spent unsupervised each day. Keep in mind, the correlation coefficient may o significant for the data given. Remember, in practice, it would not be approprlate to use the regression line to coeffidient is not statistically significant may not be statistically make a prediction if the correlation Hours unsupervised! 1 | 2 Overall Grades 98 91 79 75 72 Copy Data Step 1 of 6: Find the estimated slope. Round your answer to three decimal places Prev Answerw toEne 10 Points KeypadTablesNext 2 3 4 5 6 8 0

Explanation / Answer

The statistical software output for this problem is:

Simple linear regression results:
Dependent Variable: Overall Grades
Independent Variable: Hours Unsupervised
Overall Grades = 95.139535 - 5.0581395 Hours Unsupervised
Sample size: 5
R (correlation coefficient) = -0.94766969
R-sq = 0.89807784
Estimate of error standard deviation: 4.0801087

Parameter estimates:

Analysis of variance table for regression model:

Hence,

1. Slope = -5.058

2. y - intercept = 95.140

3. At x = 0, y = bo; Option A

4. False

5. -5.058

6. 0.898

Parameter Estimate Std. Err. Alternative DF T-Stat P-value Intercept 95.139535 2.9840179 0 3 31.883031 <0.0001 Slope -5.0581395 0.98380156 0 3 -5.1414226 0.0143

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