A random sample of 22 states found that their average state tax on a pack of cigarettes is $1.864 with a standard deviation of $0.655. Find the 90% confidence interval of the true mean tax. Show all your work for or explain how you obtained your answer in the space provided below. Yo rthe

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A: Total cost = $86 + $36= $122 Hence, μ=122σ=40 a.  The population mean cost per flight is $122…

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A: From the provided information, Mean (µ) = 29 hours Standard deviation (σ) = 4 X~N (29, 4) Here X be…

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A: Consider that μ is the population mean age of community college students.

Q: A statistics professor announces that 15% of the grades he gives are As.  The results of the final…

A: Solution:From the given information, mean score is 83, standard deviation is 6. The fifteen…

Q: Use z scores to compare the given values.   The tallest living man at one time had a height of 245…

A: The z-score of a random variable X is defined as follows: z = (X – µ)/σ. Here, µ and σ are the mean…