2.) Lantmännen Cerealia, Stockholm, has asked you to study the variability of the weights of cereal bags produced in plant 2, located in Norway. The package weights are known to be normally distributed. Using a random sample of n = 125, you find that the sample mean weight is 40.9 and the sample variance is 65. The marketing vice president claims that there is a very small probability that the population mean weight is less than 40. Use an appropriate statistical analysis and comment on her claim.
2.) Lantmännen Cerealia, Stockholm, has asked you to study the variability of the weights of cereal bags produced in plant 2, located in Norway. The package weights are known to be normally distributed. Using a random sample of n = 125, you find that the sample mean weight is 40.9 and the sample variance is 65. The marketing vice president claims that there is a very small probability that the population mean weight is less than 40. Use an appropriate statistical analysis and comment on her claim.
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Transcribed Image Text:2.) Lantmännen Cerealia, Stockholm, has
asked you to study the variability of the weights
of cereal bags produced in plant 2, located in
Norway. The package weights are known to be
normally distributed. Using a random sample
of n = 125, you find that the sample mean
weight is 40.9 and the sample variance is 65.
The marketing vice president claims that there
is a very small probability that the population
mean weight is less than 40. Use an appropriate
statistical analysis and comment on her claim.
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