Question

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 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.

Homework Answers

Answer #1

Solution:

n=23

s=65.4

confidence level=0.99

alpha=0.01

alpha/2=0.01/2=0.005

1-alpha/2=1-0.005=0.995

df = n- 1=23-1=22

99% confidence interval for standard deviation is

sqrt(n*s^2/chisqupper<sigma<sqrt(n*s^2/chisqlower)

chisqupper in excel

=CHIINV(0.005,22)

=  42.79565

chilower in excel is

=CHIINV(0.995,22)

= 8.642716

99% confidence interval for standard deviation is

sqrt{(23-1)*65.4^2/42.79565)<sigma<sqrt{(23-1)*65.4^2/8.642716)

46.891<sigma<104.343

99% lower limit for standard deviation is 46.891

99% upper limit for standard deviation is 104.343

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
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 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...
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 80​% ​confidence; n = 25​, s = 65.9. df = χ2L (chi Subscript Upper L Superscript 2) = XR2...
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 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...
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...
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...
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 chi...
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; nequals30?, sequals0.24 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...
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...
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...
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 = 29​, s = 0.29 mg. df = ? ​(Type a whole​ number.) 2χ2L = ? ​(Round to...