A random sample of state gasoline taxes (in cents) is shown here for 12 states. Use the
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A random sample of state gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90%confidence. Does your interval contain the national average of 44.7 cents?
38.4 40.9 67 32.5 51.5 43.4
38 43.4 50.7 35.4 39.3 41.4
For Exercises assume that all variables are approximately normally distributed.
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Step 1 Calculate the sample mean Sample Mean 384 409 67 325 515 434 38 434 507 354 393 414 12 Sample ...View the full answer
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Related Book For
Elementary Statistics A Step By Step Approach
ISBN: 9780077665807
9th Edition
Authors: Allan G. Bluman
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