Casio FX 1.0 PLUS, FX 2.0, FX 2.0 PLUS kZ Interval, u1-Sample Z Interval

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Confidence Interval (INTR)

kZ Interval

u1-Sample Z Interval

1-SampleZ Interval calculates the confidence interval for an unknown population mean when the population standard deviation is known.

The following is the confidence interval.

Left = o – Z	α		σ
	2
				n
Right = o + Z		α			σ
		2
						n

However, α is the level of significance. The value 100 (1 – α) % is the confidence level. When the confidence level is 95%, for example, inputting 0.95 produces 1 – 0.95 = 0.05 = α.

Perform the following key operations from the statistical data list.

4(INTR)

b(Z)

b(1-Smpl)

The following shows the meaning of each item in the case of list data specification.

Data ............................	data type
C-Level ........................	confidence level (0 <C-Level < 1)
σ ..................................	population standard deviation (σ > 0)
List ..............................	list whose contents you want to use as sample data
	(List 1 to 20)
Freq .............................	sample frequency (1 or List 1 to 20)
Save Res .....................	list for storage of calculation results (None or List 1 to 20)
Execute .......................	executes a calculation

The following shows the meaning of parameter data specification items that are different from list data specification.

o ..................................	mean of sample
n ..................................	size of sample (positive integer)

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