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A line of air conditioners is advertised as using a mean of 700 watts of power with a standard deviation of 50 watts. A rival

A line of air conditioners is advertised as using a mean of 700 watts of power with a standard

deviation of 50 watts. A rival company tests 12 of the units and finds a mean of 725 watts.

Assuming a normal distribution, test the validity of the advertisement at a 0.03 level of

significance. Determine the p value.

Need graph and every step

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