Stat 1000: Tips for Assignment 1
Published: Sun, 09/16/12
Please note that my first midterm exam prep seminar for
Stat 1000 will be on Saturday, Oct. 6, in room 100 St. Paul's College,
from 9 am to 9 pm . I am not ready to take registrations yet,
but I just wanted to give you a heads-up in case you need to make
arrangements to come. I will contact you later on when I am ready to
take registrations.
Did you miss my Tips on How to Do Well in this Course? Click here
Did you miss my Tips on what kind of calculator you should get? Click here
If you are taking the course by classroom lecture (Sections A01, A02, etc.), click here for my tips for your Assignment 1.
Tips for Assignment 1 (Sections A01, A02, etc.)
So far, I have not seen Assignment 1 yet. I am sure you will need
to study Lesson 1 in my book to prepare. I would appreciate it if
anyone could send me a copy of the first assignment. I suggest, you
click on the link to each question, select and copy the entire question
and paste it into a Word document or the like. Continue to do likewise
for each question, pasting them all into the same Word document.
Perhaps you could put each question on a new page. Finally, save the
document as either a Word file or as a PDF file and attach it to an
email to me. Then I will be able to provide tips to help with the
assignment. Thank you in advance.
Study Lesson 1 in my study book (if you have
it) to learn the concepts involved in Assignment 1. This lesson will
also set you up for Assignment 2.
Never use JMP to answer a question unless they specifically tell you to. Whenever
they do tell you to use JMP, never go out of your way to click red
triangles to add things to the graph (like put titles on histograms, or
label axes). Whatever JMP gives by default is all they require unless
they specifically request you add something to the output or remove
something from it. Of course, I will always give you specific steps to
add/remove anything they do require.
In the questions asking you what you are or are not allowed in exams, please note that a "slide rule" is just an ancient type of pathetic calculator. If you are allowed a calculator, you are allowed a slide rule (but, then again, if you use a slide rule, you probably still use clay tablets to write on).
Anytime a question wants you to "fill in the
blanks" with key vocabulary terms, go to the appropriate section of your
textbook (remember you have an online version of the textbook in Stats
Portal if you selected the electronic option on your book list), and you
will find the exact sentence they are giving you with the obvious word
they want you to type in.
The question asking you what graphs to use is really asking
you is the data "quantitative" or "categorical". If you are collecting
two sets of quantiative data, then you would use a back-to-back stemplot
or side-by-side boxplot to compare them (and no other graphs). If you
are collecting quantitative data as time goes by, you would use a time
series or timeplot and nothing else. By "how old are students' cars", assume you would say the cars are 0, 1, 2, 3, ... years old.
To type in the split stemplot they request, use the vertical
line on your computer keyboard to separate the stem from the leaves
("SHIFT \" will give you " | "). Don't worry if your columns don't end
up perfectly lined up, just do the best you can. Be sure to label the
first line in your stemplot "Stem | Leaf", then enter all the stems and
leaves row-by-row underneath. Don't forget to comment on the shape of the distribution (peaks, symmetric, left-skewed, right-skewed, outliers.)
Ignore any references to "Crunchit!". You
are using JMP 10 in this course. The assignment is just an old
assignment that they forgot to update. Use JMP 10 anytime they tell you
to use computer stuff.
For the JMP 10 part of the assignment, here are some tips:
If you have not done so already, you need to download JMP to your computer. Here is the direct link where you can get it (you need to know your UMNET ID and password):
Once you have installed JMP 10 and opened it, you are shown a
menu with various buttons to click. You will almost always click "New
Data Table" to enter new data. That is the icon on the far left of the top toolbar (it looks like a tiny little spreadsheet with a yellow star, point your mouse at it and you should see the label "New Data Table" pop up.
In the rare event they have given you a
JMP file with the data already entered in it, you will simply open that
file which would probably already open JMP for you. Just click the "Open" icon on the same toolbar as the "New Data Table" icon, or, if you already see the file in the "Recent Files" screen, simply double-click that. If you happen to
enter data in yourself and save the file (a good idea), you can select
"Open" to open up the saved file.
Question 9:
To copy and paste data into JMP: First, of
course, click the hyperlink to the data they have given you. Now, select and copy the given data set. Now, open JMP and click
"New Data Table". A pop-up window should appear showing a spreadsheet with one column labeled "Column 1". In the toolbar of this pop-up window select "Edit" then "Paste with
Column Names". That pastes all the data in and names the column
appropriately.
If you have done this correctly, you should now be looking at a column labeled "tuition" and a whole bunch of numbers representing various tuitions lined down the rows of that column.
Click the column heading "tuition" to select the column (the column name cell should be highlighted). Right-click and select "Column Info" in the menu that appears. Make sure the Data Type is Numeric and the
Modeling Type is Continuous, using the drop-down menus to fix that if
necessary. Click OK.
To make a histogram: In the toolbar at the
top, select Analyze then select Distribution. In the "Select Columns" part of the pop-up window, click the column you
want the histogram for ("tuition" in this case) to highlight it, and click the Y, Columns
button. You should see the "tutition" column appear in the section to the right of the "Y, Columns" button. Click OK.
It now opens yet another pop-up window called "Distributions" where your histogram shoud appear. Your histogram appears sideways. If they want to
see it the typical way,
click the red triangle next to your variable above the histogram and
select Histogram Options from the drop-down menu. Deselect "Vertical" and it will turn it the proper way. They did not request this, so you aren't obligated to do that. However, that would be a good idea if you wanted to properly read if the distribution is left-skewed, right-skewed or symmetric. But, they didn't ask you to describe the distribution.
Click the thin blue line that is near the top of the window to get the toolbar icons to appear. Select "File" then "Save As" to get a pop-up window. Type in whatever name you want the file to have in the "File name" section. Click the "Browse Folders" arrow and select which folder you want to save the file in (I suggest you select "Desktop" so that the file will just appear write on your desktop home screen. Finally, click the drop down arrow in the "Save as type" section and select "PDF File". Click "Save". You should now have your file ready to upload into the assignment.
Question 10
For the pole-vault question: You will have to enter the data manually into JMP. Click the "New Data Table" icon to get a fresh spreadsheet to enter new data.
Click the link to the wikipedia data and be sure to scroll down to the Womens' outdoor pole-vault data.
To enter data into JMP manually: Click "New
Data Table" and you are automatically taken to an empty spreadsheet with
one column. If you ever need two or more columns, simply double-click
the space to the right of "Column 1" to create "Column 2". You can
repeat this to create "Column 3", etc. You can then type in the data,
using "enter" or "tab" or your arrow buttons on your keyboard to move
from one cell to the next.
In this particular pole-vault question, double-click "Column
1" and name it "Year". Click OK. Double-click the space to the right
of Column 1 to create Column 2. Name that column "Height". Type in the
data you have been given. Only type in the years and heights, the rest of the columns given in wikipedia are irrelevant. Be sure to highlight each column and right-click and select "Column Info" like you did in question 9 and confirm that the "Data Type" is "Numeric" and the "Modeling Type" is "Continuous" for both columns.
To make a Time Series or Time Plot: Select Analyze in the
toolbar, then select Modeling in the drop-down list and finally select
time series. Select your time variable "year" and click "X, Time ID" and select
your variable you are tracking "height" and click "Y, Time Series". Click OK.
Just ignore that other pop-up menu asking about time lags or
autocorrelations or whatever, click OK and move on. None of that has
anything to do with the time series.
Click the thin blue line that is near the top of the window to get the toolbar icons to appear. Select "File" then "Save As" to get a pop-up window. Type in whatever name you want the file to have in the "File name" section. Click
the "Browse Folders" arrow and select which folder you want to save the
file in (I suggest you select "Desktop" so that the file will just
appear write on your desktop home screen. Finally, click the drop down
arrow in the "Save as type" section and select "PDF File". Click
"Save". You should now have your file ready to upload into the
assignment.