Follow the instruction. Top tutors only

Follow the instruction. Top tutors only

PART ONE: MEASUREMENTS*

1. *I have already collected all of the measurement data for you.*

PART TWO: REPRESENTING DATA WITH PLOTS

1. Using a graphing software of your choice, create a scatter plot of the data. Predict the line of best fit, and sketch it on the graph. Then, use the software to make a box plot.

Name	Arm span in inches (X-axis)	Height in inches(Y-axix)
Bella	57	64
Allister	74	72
Siena	57	60
Shanon	62	64
Brisha	62	62
Olivia	63	64
Emily	58	61
Sheylie	67	65
Sophie	69	68
Savannah	70	68
Carolina	62	62
La	71	70

1. Copy and paste the scatter plot and box plot into a pdf document.

PART THREE: THE LINE OF BEST FIT

1. Which variable did you plot on the x-axis, and which variable did you plot on the y-axis? Explain why you assigned the variables in that way.
2. Which two points did you use to draw the line of best fit?
3. Write the equation of the line passing through those two points using the point-slope formula y – y1 = m ( x – x1). Show all of your work.

1. What does the slope of the line represent within the context of your graph? What does the y-intercept represent?
2. Test the residuals of two other points to determine how well the line of best fit models the data.

1. Use the line of best fit to help you to describe the data correlation.

1. Using the line of best fit that you found in Part 3, Question 3, approximate how tall is a person whose arm span is 66 inches?
2. According to your line of best fit, what is the arm span of a 74-inch-tall person?

1. What might cause the arm span and height not to be equal?

1. Explain why the equation you wrote to represent a human’s arm span (measured across the body with the arms extended) is a correlation and not causation.

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