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1. With cell phone service costs dropping, a new 2017 ad from a cell phone carrier states that their average monthly bill for cell phone

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1. With cell phone service costs dropping, a new 2017 ad from a cell phone carrier states that their average monthly bill for cell phone service including taxes for two smartphones is $100. Another carrier advertises more options including additional employer discounts to further lower the monthly bill as well as more expensive plans for those seeking more services. As such the other carrier claims that the average monthly bill is not $100. A random sample of 30 customers results in an average monthly bill of $115. The population standard deviation is $45. At the 0.05 level of significance, is the other carrier's claim correct that the average monthly bill is not $100 ? i. Use the traditional method of hypothesis testing. ii. Use the P-value method

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