Monthly telephone charges for cell phone in the United States are normally distributed with a mean of $62 for a single user. Coach Keefer thinks that leasing smart phones has increased the monthly cell phone bill for a single user. O Ho : µ= 62 H : μ > 62 O Ho : µ = 62 Ha : μ> 62 Ο H0 : μ-62 H : μ4 62 O Ho : Ha : ¤ + 62 62

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