Math Problem Statement

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.

White Blood Counts of Women

9595​%

​confidence;

nequals=148148​,

sequals=1.951.95

​(1000

​cells/muμ​L).

Question content area bottom

Part 1

dfequals=147147

​(Type a whole​ number.)

Part 2

chi Subscript Upper L Superscript 2χ2Lequals=enter your response here

​(Round to two decimal places as​ needed.)

Solution

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Math Problem Analysis

Mathematical Concepts

Statistics
Chi-Square Distribution
Confidence Interval
Degrees of Freedom

Formulas

Degrees of Freedom: df = n - 1
Chi-Square Critical Values: χ²_L and χ²_R
Confidence Interval for σ: ( (n-1)s²/χ²_R, (n-1)s²/χ²_L )

Theorems

Chi-Square Distribution for Variance and Standard Deviation

Suitable Grade Level

College Level Statistics