# Statistics

## Getting started

### Typing your data in the table

When you enter the Statistics app, you must type your data in a two-column table. You can add up to 3 data tables.

• In the first column (Values), enter the values of your statistical data.
• In the second column (Sizes), enter the frequencies/sizes associated with each value in your dataset, i. e. the number of occurrences of each value.

When you fill in the first column, the second column is automatically filled in with the value $1$. This means that each of the values in your statistical data appears only once in the set. Change the sizes values in the second column if the values in your statistical set appear more than once.

Like, for example:
Let’s consider the following statistical data: $1$, $1$, $1$, $2$, $3$, $3$, $4$, $5$, $5$.
To enter this statistical data in the table, proceed as follows.

Values V1 Sizes N1
$1$ $3$
$2$ $1$
$3$ $2$
$4$ $1$
$5$ $2$

You can also enter frequencies in the Sizes column.

### Plotting data as a histogram

Once you have typed your data into the table in the Data tab, you can plot it as a histogram.

1. Select the Histogram tab at the top of the screen.
2. Confirm by pressing OK.

You then see the histogram that displays your data.

### Plotting data as a box plot

Once you have typed your data into the table in the Data tab, you can plot it as a box plot.

1. Select the Box tab at the top of the screen.
2. Confirm by pressing OK.

You then see the box plot that displays your data.

### Displaying statistical variables

Once you have typed your data into the table in the Data tab, you can display the statistical variables: mean, standard deviation, median,…

1. Select the Stats tab at the top of the screen.
2. Confirm by pressing OK.

You then see the table of statistical variables.

## Using the Data tab

### Delete a value from the data table

You can delete a row from the table by selecting a cell in that row and pressing del.

You can change the content of a cell by selecting it and typing a new value with the keyboard.

### Clearing a column of the table

You can delete all the values in a column of the table.

1. Select the name of the column you want to clear. Confirm by pressing OK.
2. The column options menu opens. Select Clear column and confirm with OK.

Clearing the Values column also clears the Sizes column.
Clearing the Sizes column fills this column with the value $1$.

### Generate a list with a formula

You can create a column of the data table using a formula involving another column.

1. Select the name of the column you want to fill. Confirm by pressing OK.
2. The column options menu opens. Select Fill with formula and confirm with OK.
3. Type your formula using the name of another column. For example, if you want column V2 to be filled with the values of V1 divided by 2, write V1/2 in the text field at the bottom of the screen. Then press OK.

To enter a capital letter, press shift then alpha then the letter to display.

## Using the Histogram tab

### Moving the cursor in the histogram

When you are in the Histogram tab, you can read the numbers and frequencies in the bar at the bottom of the screen for each rectangle. The intervals represented by the rectangles are also displayed.

To move the selection to another rectangle in the histogram, use the Left arrow and Right arrow keys.

To move to another data set, use the Up arrow and Down arrow keys.

### Setting histogram parameters

You can change the width of the histogram rectangles (bin width) and the start value of the data set.

1. Press OK.
2. The histogram settings menu opens. Enter the values for the width of rectangles and the start of the set. Confirm by selecting the Validate button and pressing the OK key.

## Using the Box tab

In the Box tab, you can read the statistical variables below the box plot:

• Minimum
• First quartile
• Median
• Third quartile
• Maximum

To move the cursor, use the Left arrow and Right arrow keys.

To move to another data set, use the Up arrow and Down arrow keys.

## Using the Stats tab

The Stats tab displays the statistical variables calculated using the data in the Data tab:

• Total size
• Minimum
• Maximum
• Range
• Mean
• Standard deviation
• Variance
• First quartile
• Third quartile
• Median
• Interquartile range
• Sum
• Sum of squares
• Sample standard deviation