# Minitab Notes for Activity 2

## Creating the Worksheet

- Label two columns as
**x** and **y**.
- Enter the x and y values from the target to the center to the washer in
each column

## Calculating the Distances (Question 4)

You need to find the mean **x** and **y**
values before completing this step.

- Label two columns as
**d1** and **d2**
- Choose Calc / Calculator
- Store your results in
**d1**
- The expression is
**SQRT(x**2+y**2)**

- Repeat the Calc / Calculator command
- Store your results in
**d2**
- The expression is
**SQRT((x-XBAR)**2+(y-YBAR)**2)** where
you replace the XBAR and YBAR by the mean for the x and y respectively

## Summarizing the Data (Question 5)

Do this as a check for the x and y and to find the
results for d1 and d2. I want you to find the values asked for by hand as
practice for the test.

Minitab does not find the variation for you. Another name for Variation
is Sum of Squares, but the Sum of Squares under the Statistics box is the
uncorrected sum of squares, which is what you get if you just square the
values and add them up, not the value we want which is found by subtracting
the mean before squaring the values.

- Choose Stat / Basic Statistics / Display Descriptive Statistics
- Select the four variables
**x**, **y**,
**d1**, and **d2** by either double clicking each
one or by highlighting them all and clicking Select.
- Click on Statistics
- Turn on the box for Variance
- Turn off the box for N Missing and SE Mean
- Click OK

- Click OK

You should get some output that looks like this.

**Descriptive Statistics: john, sue**
Variable N Mean StDev Variance Minimum Q1 Median Q3 Maximum

john 6 6.267 2.242 5.027 3.400 4.375 5.900 8.725 9.100

sue 5 5.500 1.214 1.475 4.100 4.500 5.200 6.650 7.300

Check the sample size, mean, median, variance, and standard deviation
with what you calculated by hand.