Fast food estimates means sodium in one breakfast sandwich 920 milligram but believe it more. Random sample 44 sandwich has mean sodium 925 milligrams. Assume population deviation 18 milligram.  ~=.10. hypothesis test results in rejecting null hypothesis.  Do you have enough evidence to reject?

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A: Solution To test the hypothesis we will use z distribution.

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A: n = 80x¯ = 455σ = 11395% ci for μ = ?