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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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blankship blankship
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A year ago
Sales from a chain of computer stores are normally distributed, with an average monthly sales volume of $280,560. Estimating the amount of monthly variability in sales is of interest to help anticipate normal income fluctuations. A random sample of 8 months’ sales data yields a standard deviation of $10,423. What is a 98% confidence interval for the standard deviation of monthly sales volume?


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($172,694.71, $666,866.84)



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($6152.47, $21,491.21)



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($6123.96, $27,725.40)



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($6415.73, $24,774.57)

Textbook 
Introductory Statistics: A Problem-Solving Approach

Introductory Statistics: A Problem-Solving Approach


Edition: 3rd
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apinaapina
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