{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Seminar_2_Statdisk_rmorel01_Seminar_2_Statdisk_Assignment_Rob_Morell

# Seminar_2_Statdisk_rmorel01_Seminar_2_Statdisk_Assignment_Rob_Morell

This preview shows pages 1–2. Sign up to view the full content.

Excellent job Rob—this is laid out beautifully. You took a wrong turn to find the best predictive value though—see below. It is always good to provide a nice concise summary statement in problems such as this: The best predicted breaking distance for a 4,000lb car = 136.781 feet. See below for other feedback, esp for the last two questions. Score = 5 – 1 = 4 Seminar 2 Statdisk Assignment Name : Rob Morell 1) 2. Using the prediction procedure, find the best predicted braking distance for a car that weighs 4000 lbs. For #2, first we need to find r the linear correlation coefficient for the data set. r for the weight and braking distances = -0.0867286 Next we need to find the critical value, so refer to Table A-6. We have paired data and n = 32. Critical value = ±0.3493697 Does the linear correlation for the data support a linear correlation?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The absolute value of r = -0.0867286 is less than the critical value r = ±0.3493697 Th ere is not a linear correlation between the weight and braking distance. • If there is a linear correlation, then we input the necessary data into the prediction equation to find the best predicted value for braking distance for a vehicle weighing 4000 lbs. yhat = b0 + b1x • If there is not a linear correlation, then we use the sample mean for y as the best predicted braking distance. You'll need to calculate that. 3. Just for practice, find the regression equation, letting the first variable be the predictor (x) variable. yhat = b0 + b1x Y = b0 + b1x y = 141.244 + -0.0012379*4000 y=141.244 + -4.9516 y=141.244 - 4.9516= 136.2924 y=136 .2924...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

Seminar_2_Statdisk_rmorel01_Seminar_2_Statdisk_Assignment_Rob_Morell

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online