Casio ALGEBRA FX2.0 Advanced Statistics Examples 2 Manual do Utilizador descarregar pdf (Página 12)

examples

Example Factory A and Factory B both manufacture the same item. To compare

the productivity of the two factories, the production data shown below

was collected for 10 items at Factory A and nine items at Factory B.

Factory A: 78, 80, 79, 83, 82, 85, 78, 74, 76, 84 (kg/h)

Factory B: 81, 84, 82, 88, 86, 83, 78, 84, 89 (kg/h)

Construct a 95% confidence interval for the difference between

1 and

2 when the following is assumed:

, Factory A population

distribution is N(

), and Factory B population distribution is N(

Procedure

1 m STAT2

2hiwiawhjwidwicw

ifwhiwhewhgwiew

ibwiewicwiiwigw

idwhiwiewijw

3 4(INTR) c(T)c(2-Smpl)

4 1(LIST) c

.jfw

1(LIST)bwc

1(LIST)cwc

1(1)c

1(On)c

1(None)c

5 1(CALC)

Result Screen

Thus, the 95% confidence interval for

becomes -7.4<

2<-0.6.

1 2 ... 7 8 9 10 11 12 13 14

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