A fast food restaurant estimates that the mean sodium content in one of its brea

Question

A fast food restaurant estimates that the mean sodium content in one of its breakfast sandwiches is no more than 910 milligrams. A random sample of 36 breakfast sandwiches has a mean sodium content of 902 milligrams. Assume the population standard deviation is 23 milligrams. At alpha equals0.05 , do you have enough evidence to reject the restaurant's claim? Complete parts (a) through (e).

(A) Identify the critical value(s). Use technology. Zo = ___

(Use a comma to separate answers as needed. Round to two decimal places as needed.)

Explanation / Answer

Test Statistic
Population Mean(U)=910
Given That X(Mean)=902
Standard Deviation(S.D)=23
Number (n)=36
we use Test Statistic (Z) = x-U/(s.d/Sqrt(n))
Zo=902-910/(23/Sqrt(36)
Zo =-2.09

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