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10. Suppose that it is known from experience that the standard deviation of the weight of 8-ounce packages of cookies made by a certain bakery is 0.16 ounce. To check whether its production is under control on a given day, that is, to check whether the true average weight of the packages is 8 ounces, employees select a random sample of 25 packages and find that their mean weight is 8.091 ounces. Since the bakery stands to lose money when ? > 8 and the customer loses out when ? < 8 . Test the null hypothesis ? = 8 against the alternative hypothesis ? ? 8 at the 0.01 level of significance (Reference Z_{0.005} = 2.575 )

          10. Suppose that it is known from experience that the standard deviation of the weight of 8-ounce packages of cookies made by a certain bakery is 0.16 ounce. To check whether its production is under control on a given day, that is, to check whether the true average weight of the packages is 8 ounces, employees select a random sample of 25 packages and find that their mean weight is 8.091 ounces. Since the bakery stands to lose money when ? > 8 and the customer loses out when ? < 8 . Test the null hypothesis ? = 8 against the alternative hypothesis ? ? 8 at the 0.01 level of significance (Reference Z_{0.005} = 2.575 )

10. Suppose that it is known from experience that the standard deviation of the weight of 8-ounce packages of cookies made by a certain bakery is 0.16 ounce. To check whether its production is under control on a given day, that is, to check whether the true average weight of the packages is 8 ounces, employees select a random sample of 25 packages and find that their mean weight is 8.091 ounces. Since the bakery stands to lose money when ? > 8 and the customer loses out when ? < 8 . Test the null hypothesis ? = 8 against the alternative hypothesis ? ? 8 at the 0.01 level of significance (Reference Z0.005 = 2.575 )

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