7. Using statistics
M¿
Press to use statistics mode. Statistics mode allows you to enter data and apply the statistics functions to analyse the data.
Entering a list of data items to analyse
À
Press after each data element. When you press À, the calculator displays the number of data elements entered.
For example, to enter a list of data consisting of 5, 8 and
To enter the results of a calculation as a data item, perform the calculation as you would normally, then press À when the answer is displayed.
You can amend the data entered into the calculator:
To cancel the last entry you made, press Ô before you press À. Note that when you press Ô, 0 is displayed. Press In to display the number of data elements stored in the calculator. To delete a data item you entered previously, enter the value again, then press IÁ.
Using statistical functions on your data
In
ÒÑ
ÏÍ
Î
Once you enter a list of data values you can use the following statistical functions:
In The number of data elements entered
IÒ Sample standard deviation
IÑ Population standard deviation
IÏ Arithmetic mean
IÍ The sum of each data element
IÎ The sum of the data elements squared
ÀFind the sample standard deviation of the data 5, 9 13 and 6. M¿5À9À13À6ÀIÒ
SD 3.593976442
4, 1, 82, 59, 2, and 103 were entered, but 59 was entered by mistake. It should have been 58. To fix the mistake, enter the wrong number, 59, and IÁ, then enter the right number, 58, and À.
Using statistics | 19 |
