A company claims that the mean weight perapple they ship is 120 grams with a standarddeviation of 12 grams. Data generated from asample of 49 apples randomly selected from ashipment indicated a mean weight of 122.5grams per apple. Is there sufficient evidence toreject the company?s claim? (use? = 0.05)
Bottles of a popular cola drink are supposed
to contain 300 ml of cola. There is some
variation from bottle to bottle because the filling
machinery is not perfectly precise. The
distribution of the contents is normal with
standard deviation of 3 ml. A student who
suspects that the bottler is under-filling measures
the contents of six bottles. The results are:
299.4 297.7 301.0 298.9 300.2 297.0
Is this convincing evidence that the mean
contents of cola bottles is less than the advertised
300 ml? Test at the 5% significance level
This question was answered on: Sep 18, 2020
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