The lifetime of inexpensive bags of a sample of 25 bags has


The lifetime of inexpensive bags of a sample of 25 bags has a standard deviation of 4.8 months assume the variable is normally distributed. use the chi-square distribution table to find any chi-square values to three decimal places. round your final answers to one decimal place. finding the 90% confidence interval for the variance and standard deviation is want I need help with please

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Basic Statistics: The lifetime of inexpensive bags of a sample of 25 bags has
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