Use the Given Degree of Confidence and Sample Data to Find

question 55

Multiple Choice

Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation ?.
Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation.
-Weights of men: $90 \%$ confidence; $\mathrm { n } = 14 , \overline { \mathrm { x } } = 154.8 \mathrm { lb } , \mathrm { s } = 11.1 \mathrm { lb }$

• A) \(8.7 \mathrm { lb } < \sigma < 14.3 \mathrm { lb }\)
• B) \(8.2 \mathrm { lb } < \sigma < 15.6 \mathrm { lb }\)
• C) \(9.0 \mathrm { lb } < \sigma < 2.7 \mathrm { lb }\)
• D) \(8.5 \mathrm { lb } < \sigma < 16.5 \mathrm { lb }\)

Understand the concepts of direct material and direct labor variances including rate, efficiency, and quantity variances.

Identify and calculate variances related to direct material price and quantity.

Identify and calculate variances related to direct labor rate and efficiency.

Understand the components and calculations of variable overhead and fixed overhead variances.

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