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15. A doctor claims that the proportion of Americans exercising the recommended minimum of 45 minutes per day is less than ten percent.  A sample of 550 Americans reveals that 52 of them exercise at least 45 minutes per day.  At the 10% significance level test the doctor’s claim.

Claim: ρ < 0.10,

Ho:  ρ ≥ 0.10    Ha:  ρ < 0.10 

z = -0.43, Critical Value = -1.282

The sample data does not support the claim...