John Wiley & Sons TI-83 User Manual download pdf (Page 59)

Press the STAT key.

Press the ► key twice to highlight TESTS.

Press the number 5 key.

Type in .9 for p

Type in 129 for x.

Type in 150 for n.

Move the cursor over <P

and press the ENTER key.

Move the cursor over Calculate and press the ENTER key.

The 1-PropZTest output shows the

alternative hypothesis: prop <.9

test statistic: Z=-1.632993162

p-value: P=.0512352053

sample proportion: ê=.86

sample size: n=150

The p-value is 0.051, which is more than 2.5%. We fail to reject H

and conclude that the

machine does not need adjustment.

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John Wiley & Sons TI-83 User Manual Page 59