6-6-8

 

Confidence Interval

Left ..............................

confidence interval lower limit (left edge)

Right ............................

confidence interval upper limit (right edge)

ˆp1 .................................

estimated sample propotion for sample 1

ˆp2 .................................

estimated sample propotion for sample 2

n1 .................................

size of sample 1

n2 .................................

size of sample 2

k t Interval

u 1-Sample t Interval

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

The following is the confidence interval. α is the level of significance. The value 100 (1 – α) % is the confidence level.

Left = o– tn – 1

α xσn–1

2

 

 

 

 

 

 

 

 

 

 

 

 

 

n

 

 

 

Right = o+ tn – 1

α xσn–1

2

 

 

 

 

 

 

 

n

 

Perform the following key operations from the statistical data list.

4(INTR)

2(t)

1(1-S)

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)

List ..............................

list whose contents you want to use as sample data

 

(List 1 to 26)

Freq .............................

sample frequency (1 or List 1 to 26)

Save Res ....................

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

Execute .......................

executes a calculation

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

20050401