1. First, we turn on the electronic calculator and press the "mode/setting" key to the left of "On".
2. Select "2: STAT" in the three pop-up modes, that is, press the number key 2.
3. Select "1: 1-var" in the pop-up interface, that is, press the number key 1.
Next, we need to input the number to be calculated. For example, if the standard deviation to be calculated is 2,4, 1.4,2.1.4, then enter "2=, 4=, 1.4=, 2. 1=, 4=" in the calculator.
5. After entering the number, press "AC", then select "shift" and press the number key "1". Select "5: var" in the pop-up option bar, that is, press the number key 5.
6. After pressing the number key 5, four options will appear in the calculator display interface. Press the number key 4 to obtain the standard deviation.
Calculator details
Calculator is an electronic machine invented by modern people that can perform digital operations. Modern electronic calculator is a hand-held electronic machine that can perform mathematical operations. Ruler silver has an integrated circuit chip, but its structure is much simpler than that of a computer. It can be said that it is the first generation of electronic computers with weak functions, which is more convenient and cheaper. It can be widely used in business transactions and is one of the necessary office supplies. In addition to displaying the calculation results, there are often overflow instructions. The power supply of the calculator is AC converter or battery.
Calculator is generally composed of arithmetic unit, controller, memory, keyboard, display, power supply and some optional peripheral devices and electronic accessories, and is composed of manual or mechanical equipment. The arithmetic unit and controller of low-level calculator realize simple serial operation through digital logic circuit, and its random access memory has only one or two units for accumulation storage.
High-end calculator consists of microprocessor and read-only memory, and has many random storage units to store input programs and data. Statistical Calculator A calculator designed for people with statistical needs, which can be software or physical objects.