M calculus teacher told me that I needed to disable plots. I did a statistics problem involving plots. And I have cleared the plots. However, now, when I enter a function in the y=editor an error appears. It says error, undefined variable.
I hit enter. Then home screnn comes up and asks me to define it.
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You cannot have a scatter plot with just one variable. You need values in L1 and values in L2. If you have only one set of values you can do 1-var statistics and plot a histogram (x-value vs. frequency).
I''m glad you got this to work. For anyone else with this problem, in the y = page you can go to f5 and reset the settings, or you can highlight the plot 1 line and press [clear] this will not clear any other settings you may have inputted.
I have no clear idea what you mean by solve statistics problem. But if your problems involve finding the standard deviation and other statistical values then this post will help you.
The variance is the square of the standard variation
TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.
know the theory. I will show you the key strokes
1-Var statistics Press [MODE][3:STAT] [1:1-VAR].
You are ready to
enter values in the X column. Enter a number and press [=]. Cursor
jumps to second number to enter. Keep entering numbers and pressing
[=] till all numbers are in. Press the [=] key after the
last one. Press
[AC] key to clear the screen. Press
[SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the
statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1. Press
number corresponding to the statistical value you want, ex 1:n . The
variable appears on screen. Press [=] and it will be displayed. To
display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .
To access the sum of squares sigma x^2 and the sum of data sigma x
press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x].
Press [SHIFT][STAT][6:MinMax] to access minX and maxX.
For 2-var statistics To
2 variable statistics you press [MODE][3:STAT] and any of the
other regression options (except 1:1-Var). A two column template opens
where you enter the X and Y values. When finished entering data, press
[SHIFT][STAT][5:Var]. to access the different statistics. As I assumed
above, you should be able to
recognize what each variable means.
Even though implied multiplication is accepted generally by the calculator when it involves a number and variable, it leads to errors when it involves two sybmols, xsin(x) is interpreted as a function called XSIN not X*SIN(X). Suppose you have a function y1, function of t and you write ty1 the calculator will generate an undefined variable error: It reads ty1 as a variable.To prevent the error message you should write t*y1, showing the multiplication explicitly. Similarly if you write y1'=0.001y1(100-t) the expression y1(100-t) is interpreted as a function call: the function y1 is called with argument 100-t. If it is what you want you should explicitly express the multiplication and wrtite y1'=0.001y1*(100-t).
That means one (or more) of the variables you have in your function is not defined. Check to make sure you didn't misspell any variable name. Also, check to make sure you didn't run two variable names together. "ab" is the variable ab, not a times b.