Mathematics, 13.03.2020 00:12 rtryf57rfgth
Ecn 221 A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were 3.0873.1313.2413.2413.2703.3533.400 3.4113.4373.477 Click here for the Excel Data File (a) Construct a 90% confidence interval for the true mean weight. (Round your answers to 4 decimal places.)
Answers: 2
represent the sample mean for the sample 
population mean (variable of interest)
(1)
(2)
(3)
we need to find first the degrees of freedom, given by:
and 
, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,9)".And we see that 
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Ecn 221 A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed o...
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