00:01
So we have our x data being the number of inches of rainfall, and we have the y variable being the yield of wheat in bushels per acre.
00:19
And so this is again in bushels per acre.
00:24
And i don't know over what period of time kept in there, so i don't know what the period of time is.
00:30
And it ends up, it says when the rainfall is 11, so when x is equal to 11 inches, we want to find a 95 % prediction interval for the yield of wheat.
00:45
But we need lots of other things to do.
00:47
We have the data.
00:48
I've entered the data into my calculator, into list 1 and list 2, into my ti -84.
00:55
And it says that you want to collect the data, use a ti -84 options to find the following.
01:01
And so i am going to go to my lenregt test.
01:10
And so that's under stat and test and lenregt test.
01:16
And i have my data in list 1 and list 2.
01:19
I'm going to do a not equal to.
01:21
And so it's asked you to find what the p value is for correlation.
01:26
The p value for correlation having our assumption be that the correlation slope is equal to zero or the correlation coefficient is zero, and alternately that the correlation coefficient is not zero and that the slope is not zero.
01:44
And the p value for this is a value of .123450s and then a 316.
01:55
Next, you want to know, oh, you said the three decimal places.
02:00
Well, to three decimal places, it's .000...