Confidence interval estimation
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Car Antifreeze:
A container of car antifreeze is supposed to hold 3785mL of the liquid. Realizing that fluctuations are inevitable, the quality-control manager wants to be quite sure that the standard deviation is less than 30mL. Otherwise, some containers would overflow while others would not have enough of the coolant. She selects a sample random sample, with the results given here. Use these sample results to construct the 99% confidence interval for the true value of σ. Does this confidence interval suggest that the fluctuations are at an acceptable level?
3761 3861 3769 3772 3675 3861 n = 18
3888 3819 3788 3800 3720 3748 x = 3787.0
3753 3821 3811 3740 3740 3839 s = 55.4
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Solution Summary
The solution provides step by step method for the calculation of confidence interval . Formula for the calculation and Interpretations of the results are also included.
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Estimating a Population Variance
Please show step-by-step process and explanation. Include the Chi-Square Distribution on word doc.
Car Antifreeze:
A container of car antifreeze is supposed to hold 3785mL of the liquid. Realizing that fluctuations are inevitable, the quality-control manager wants to be quite sure that the standard deviation is less than 30mL. ...
Purchase this Solution
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