Question

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?

Answer #1

df = n -1 = 28 -1 = 27

Chi square critical values at 0.02 level with 27 df = L = 12.879 , R = 46.963

98% confidence interval for is

sqrt [(n-1) S^{2} / R ]
< < sqrt [(n-1)
S^{2} / L
]

sqrt [ 27 * 65.5^{2} / 46.963 ] < < sqrt [
27 * 65.5^{2} / 12.879 ]

49.66 < < 94.84

98% CI Is **( 49.66 , 94.84)**

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

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 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 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.
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65.9.
df =
χ2L (chi Subscript Upper L Superscript 2) =
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with a normal distribution.
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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; n=23, s=0.27 mg.
Use the given information to find the number of degrees of
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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 98%
confidence; nequals21, sequals0.28 mg. LOADING... Click the icon
to view the table of Chi-Square critical values. dfequals nothing
(Type a...

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 %
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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.

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