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U 2-prop, Interval, Left = – – z α 2 x – Casio SERIES FX-9860G User Manual

Page 345: 1– n, Right = – + z α 2 x

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20070201

u 2-Prop

Z

Interval

2-Prop

Z

Interval uses the number of data items to calculate the confi dence interval for the

defference between the proportion of successes in two populations.

The following is the confi dence interval.

α

is the level of signifi cance. The value 100 (1 –

α

)

% is the confi dence level.

n

1

,

n

2

: size of sample

x

1

,

x

2

: data

Perform the following key operations from the statistical data list.

4(INTR)
1(Z)
4(2-P)

Data is specifi ed using parameter specifi cation. The following shows the meaning of each
item.

C-Level ......................... confi dence level (0 < C-Level < 1)

x

1

................................. data value (

x

1

> 0) of sample 1

n

1

................................. size (positive integer) of sample 1

x

2

................................. data value (

x

2

> 0) of sample 2

n

2

................................. size (positive integer) of sample 2

Save Res ..................... list for storage of calculation results (None or List 1 to 26)

Execute ........................ executes a calculation

After setting all the parameters, use

c to move the highlighting to “Execute” and then press

the function key shown below to perform the calculation.

1(CALC) ... Performs the calculation.

Calculation Result Output Example

Left = – – Z α

2

x

1

n

1

x

2

n

2

n

1

n

1

x

1

1– n

1

x

1

+

n

2

n

2

x

2

1– n

2

x

2

Right = – + Z α

2

x

1

n

1

x

2

n

2

n

1

n

1

x

1

1– n

1

x

1

+

n

2

n

2

x

2

1– n

2

x

2

Left = – – Z α

2

x

1

n

1

x

2

n

2

n

1

n

1

x

1

1– n

1

x

1

+

n

2

n

2

x

2

1– n

2

x

2

Right = – + Z α

2

x

1

n

1

x

2

n

2

n

1

n

1

x

1

1– n

1

x

1

+

n

2

n

2

x

2

1– n

2

x

2

6-6-7

Confi dence Interval