Display numeric view, Display plot view – HP 39g Graphing Calculator User Manual

Page 124

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11. Specify a 90% confidence interval in the C : field.

S S S /

!Ovc to the

C: field

0.9

(

enter

sx: .297844254603

SqHptg Hg-jfi__________

Display

Numeric view

12. Display the confidence interval in the Numeric view.

Note: The interval setting is 0.5.

NUM

INF STAT NUMERIC VIEW|

C= . 9

Critic*]«. T=±2. 015048

n. Mir> =. 3469814

R Hcx =. 8370186

Display Plot

view

13. Display the confidence interval in the Plot view.

(

plot

-2.0

.3HE

______ 1

150HB t-CRIT. TO- 2.01S

aaiH 4-

a ^

.532

04B

IBB

You can see, from the
second text row, that the

I——mni

mean is contained within the 90% confidence interval

(Cl) of 0.3469814 to 0.8370186.

Note: The graph is a simple, generic hell-curve. It is not
meant to accurately represent the t-distribution with 5
degrees of freedom.

9-8

Inference aplet