HP F2226A - 48GII Graphic Calculator User Manual page 616

Example 2 -- For µ = 150, x = 158, s = 10, n = 50, for α = 0.05, test the
0
: µ = µ
hypothesis H , against the alternative hypothesis, H
0 0
population standard deviation, σ, is not known.
Press ‚Ù—— @@@OK@@@ to access the hypothesis testing feature in the
calculator. Press ——@@@OK@@@ to select option 5. T-Test: 1 µ.:
Enter the following data and press @@@OK@@@:
Select the alternative hypothesis, H
We reject the null hypothesis, H
: µ > 150.
H The test t value is t
1
0.000000393525. The critical value of t is t
a critical x = 152.371.
Press @GRAPH to see the results graphically as follows:
Example 3 – Data from two samples show thatx
10, s = 4.5, n1 = 50, and n
2
: µ > 150, and press @@@OK@@@. The result is:
1
: µ
= 150, against the alternative hypothesis,
0 0
= 5.656854, with a P-value =
0
= 1.676551, corresponding to
α
= 158, x
1
For α = 0.05, and a "pooled"
= 55.
2
: µ > µ
. The
1 0
= 160, s =
1 1
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