How To Graph A Scatter Plot On A Graphing Calculator

Scatter charts are used to visualize the relationship or combination between two variables. For example, can you say in general that studying more leads to better grades? We can investigate this by collecting data on students’ study time and perhaps their scores on a final exam and then generating a scatter plot. The overall model will help us determine the type of study time in relation to final exam scores. On the TI83 or 84 line of graphing calculators, getting a scatter plot is fairly easy. Let’s use an example dataset to walk through the process. Read: how to draw a scatter plot on a graphing calculator

Example

The table below shows the height (inches) and weight (pounds) of seven players randomly selected from the Chicago Cubs active roster. Height, x 76 72 77 73 69 75 71 Weight, y 240 190 215 185 180 210 210 We will use height as independent variable (predictor) and weight as dependent variable (response) . Often textbooks will tell you which are considered x (predictions) and y (responses). If not, be sure to check out the article on how to read a scatter plot to better understand how to choose these variables.

Step 1: Enter data.

To enter data into your computer, press [STAT] and then select 1. Edit.Now enter the values ​​for x (prediction) into L1 and the values ​​for y (response) into L2. Just type the number and press enter to go to the next space. Read more: how to say thank you in cantonese | Top Q&APress the right arrow to go to L2. Note that we keep the data in the SAME ORDER as the original table.

Step 2: Set up the scatter plot in STAT PLOTS.

To get to the statplot menu, press [2nd] and [Y=] (at the top of the computer).Press [ENTER] or 1: Box 1… to enter the next menu. When in this menu, tick [ON] and press [ENTER] to enable the histogram and then make sure that the minigraph looks like the scatterplot is selected for TYPE. You can do this by highlighting it and pressing [ENTER].

Step 3: View the scatter chart

When plot 1 is on, you can press [ZOOM] at the top of the calculator and select 9: ZoomStat to see the scatter plot.Read more: how to cope when your partner works all night [ENTER] or type 9, the plot will appear!It doesn’t have any labels or anything, but you can use it to see if linear regression is a good fit or just to see what kind of sample is available. Here, it seems that taller players tend to weigh more, but because the points are not very close together, the association between height and weight is not very strong. If you want to see which point it is, you can press [TRACE] and use the arrows to jump from one point to another.

Resovle problem

Problem: When you select Zoomstat, you get an error.

Believe it or not, the most common cause of this is that you leave your computer in your backpack and accidentally type all sorts of stuff in the y-list. I see it every semester! To check, press [Y=] and scroll through to make sure there’s nothing next to any y on the menu.Make sure to scroll through the entire list! There can’t be anything there! Also, the only plot highlighted at the top should be PLOT1. Others should not be marked.

Problem: Error: DIM

This is a dimension error. It means that the number of values ​​in L1 is different from the number of values ​​in L2. Go back and find the number you missed!

Problem: There is no L1 on your computer

Here is an easy fix. Check out this article to know how to get L1 back. Read more: how to fix a broken tent zipper

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