Page 18-30
Example 2 -- Data from two samples (samples 1 and 2) indicate that
⎯
x
1
=
57.8 and
⎯
x
2
= 60.0. The sample sizes are n
1
= 45 and n
2
= 75. If it is
known that the populations’ standard deviations are
σ
1
= 3.2, and
σ
2
= 4.5,
determine the 90% confidence interval for the difference of the population
means, i.e.,
μ
1
-
μ
2
.
Press
‚Ù—
@@@OK@@@
to access the confidence interval feature in the
calculator. Press
˜
@@@OK@@@
to select option 2. Z-INT:
μ
1 –
μ
2.. Enter the
following values:
When done, press
@@@OK@@@
. The results, as text and graph, are shown below:
The variable
Δμ
represents
μ
1 –
μ
2.
Example 3 – A survey of public opinion indicates that in a sample of 150
people 60 favor increasing property taxes to finance some public projects.
Determine the 99% confidence interval for the population proportion that would
favor increasing taxes.
Press
‚Ù—
@@@OK@@@
to access the confidence interval feature in the
calculator. Press
˜˜
@@@OK@@@
to select option 3. Z-INT:
μ
1 –
μ
2.. Enter the
following values:
Summary of Contents for 50G
Page 1: ...HP g graphing calculator user s guide H Edition 1 HP part number F2229AA 90006 ...
Page 130: ...Page 2 70 The CMDS CoMmanDS menu activated within the Equation Writer i e O L CMDS ...
Page 206: ...Page 5 29 LIN LNCOLLECT POWEREXPAND SIMPLIFY ...
Page 257: ...Page 7 20 ...
Page 383: ...Page 11 56 Function KER Function MKISOM ...
Page 715: ...Page 21 68 Whereas using RPL there is no problem when loading this program in algebraic mode ...
Page 858: ...Page L 5 ...