In Constructing a Confidence Interval For $\sigma$ Or $\sigma ^ { 2 }$

question 46

Multiple Choice

In constructing a confidence interval for $\sigma$ or $\sigma ^ { 2 }$ , a table is used to find the critical values $\chi _ { \mathrm { L } } ^ { 2 } \text { and } \chi _ { \mathrm { R } } ^ { 2 }$ for values of $n \leq 101$ For larger values of n, $\chi _ { \mathrm { L } } ^ { 2 } \text { and } \chi _ { \mathrm { R } } ^ { 2 }$ can be
approximated by using the following formula: $\chi ^ { 2 } = \frac { 1 } { 2 } \pm z _ { \alpha / 2 } + \sqrt { 2 k - 1 } ^ { 2 }$ where k is the number of degrees of freedom and $z _ { \alpha / 2 }$ is the critical z-score. Construct the 90 % confidence interval for $\sigma$ using the following sample data: a sample of size n=232 yields a mean weight of 154 lb and a standard deviation of 25.5 lb. Round the confidence interval limits to the nearest hundredth.

• A) \(23.66 \mathrm { lb } < \sigma < 27.58 \mathrm { lb }\)
• B) \(23.39 \mathrm { lb } < \sigma < 28.09 \mathrm { lb }\)
• C) \(24.09 \mathrm { lb } < \sigma < 27.15 \mathrm { lb }\)
• D) \(23.71 \mathrm { lb } < \sigma < 27.65 \mathrm { lb }\)

Identify the different types of amnesia and their effects on memory.

Appreciate the role of neurogenesis in memory formation and recall.

Understand the physiological basis of memory and its storage in the brain.

Recognize memory biases and their effects on eyewitness testimony.

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Definitions:

Noncustodial Fathers

Fathers who do not have legal custody of their child/children, and thus the children reside primarily with the other parent.

Custodial Mother

A mother who has been granted primary legal and/or physical custody of her child(ren) by a court.

Child Support

Financial contributions required by law to be made by a non-custodial parent to support their child(ren)'s upbringing and welfare.

Remarriage

Entering into marriage again after one or more previous marriages have ended through divorce or widowhood.