We Record the Amount of Time (Xin Minutes) Per Day

question 47

Multiple Choice

We record the amount of time (xin minutes) per day that a group of 12 high school students spend using their cell phone (texting, talking, and web use) .We also record the overall GPA (y) of each student.Following is a regression summary for these data: ​

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What is a 90% confidence interval for β0, the mean GPA of high school students who spent no time using their cell phone?

• A) (-0.0225, -0.0082)
• B) (3.4545, 4.5623)
• C) (-0.0212, -0.0095)
• D) (3.5578, 4.4590)

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Definitions:

Z-Scores

A measure that represents the number of standard deviations a data point is from the mean of the dataset.

Z-Score

A statistical metric that describes a value's relationship to the mean of a group of values, measured in terms of standard deviations.

Z-Score

A statistical measure that describes a score's relationship to the mean in a group of scores, typically used to understand how far a point is from the average in terms of standard deviations.

Z-Score

A numerical indicator that represents how a specific value compares to the average of a dataset, illustrated by the number of standard deviations it is from that average.