Question

Finding Critical Values and Confidence Intervals. In Exercises 5-8 use the given information to find the number of degrees of freedom, the critical values X_L^2and X_R^2, and the confidence interval estimate of ơ. The samples are from Appendix B and it is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. 6. Weights of Pennies 95% confidence; n = 37, s = 0.001648 g.

Answer #1

Chi square critical value at 0.05 level with 36 df are

L = 21.336 , U = 54.437

95% confidence interval for is

Sqrt[ (n-1) S^{2} /
U ] < < Sqrt[ (n-1)
S^{2} /
L ]

Sqrt [ 36 * 0.001648^{2} / 54.437 ] <
< sqrt [ 36 * 0.001648^{2} / 21.336 ]

0.001340 < < 0.002141

99% CI is **( 0.001340 , 0.002141)**

Use the given information to find the number of degrees of
freedom, the critical values chi Subscript Upper L Superscript 2
and chi Subscript Upper R Superscript 2, and the confidence
interval estimate of sigma. It is reasonable to assume that a
simple random sample has been selected from a population with a
normal distribution.
Nicotine in menthol cigarettes 99% confidence; n=23, s=0.27 mg.
Use the given information to find the number of degrees of
freedom, the critical values chi...

use the given information to find the number of
degrees of freedom the critical values x2l and x2r and the
confidence interval estimate of the standard deviation it is
reasonable to assume that a simple random sample has been selected
from a population with a normal distribution platelet counts of
women 98% confidence in equals 28 s equals 65.5 what is the degrees
of freedom...X2L...X2R..CI estimate of the standard deviation?

Use the given information to find the number of degrees of
freedom, the critical values chi Subscript Upper L Superscript 2χ2L
and chi Subscript Upper R Superscript 2χ2R, and the confidence
interval estimate of sigmaσ. It is reasonable to assume that a
simple random sample has been selected from a population with a
normal distribution. Nicotine in menthol cigarettes 95%
confidence; nequals=30, sequals=0.27 mg.

Use the given information to find the number of degrees of
freedom, the critical values chi Subscript Upper L Superscript 2
and chi Subscript Upper R Superscript 2, and the confidence
interval estimate of sigma. It is reasonable to assume that a
simple random sample has been selected from a population with a
normal distribution. Platelet Counts of Women 95% confidence;
n=26, s=65.9

Use the given information to find the number of degrees of
freedom, the critical values chi Subscript Upper L Superscript 2χ2L
and chi Subscript Upper R Superscript 2χ2R, and the confidence
interval estimate of sigmaσ. It is reasonable to assume that a
simple random sample has been selected from a population with a
normal distribution. Nicotine in menthol cigarettes 95%
confidence;
nequals=27, sequals=0.24mg.
please help, thank you

Use the given information to find the number of degrees of
freedom, the critical values chi Subscript Upper L Superscript 2
χ2L and chi Subscript Upper R Superscript 2 χ2R , and the
confidence interval estimate of sigma σ. It is reasonable to assume
that a simple random sample has been selected from a population
with a normal distribution. Nicotine in menthol cigarettes 95 95 %
confidence; n equals = 25 25 , s equals = 0.28 0.28 mg.

Use the given information to find the number of degrees of
freedom, the critical values chi Subscript Upper L Superscript 2
and chi Subscript Upper R Superscript 2, and the confidence
interval estimate of sigma. It is reasonable to assume that a
simple random sample has been selected from a population with a
normal distribution.
Nicotine in menthol cigarettes 99% confidence; nequals23,
sequals0.22 mg.

Use the given information to find the number of degrees of
freedom, the critical values chi Subscript Upper L Superscript 2
and chi Subscript Upper R Superscript 2, and the confidence
interval estimate of sigma. It is reasonable to assume that a
simple random sample has been selected from a population with a
normal distribution. Platelet Counts of Women 99% confidence;
nequals23, sequals65.4.

Use the given information to find the number of degrees of
freedom, the critical values chi Subscript Upper L Superscript 2
and chi Subscript Upper R Superscript 2, and the confidence
interval estimate of sigma. It is reasonable to assume that a
simple random sample has been selected from a population with a
normal distribution.
Platelet Counts of Women 99% confidence; nequals23,
sequals65.1.

Use the given information to find the number of degrees of
freedom, the critical values
chi Subscript Upper L Superscript 2χ2L
and
chi Subscript Upper R Superscript 2χ2R,
and the confidence interval estimate of
sigmaσ.
It is reasonable to assume that a simple random sample has been
selected from a population with a normal distribution.
Platelet Counts of Women
99%
confidence;
nequals=29
sequals=65.5

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