In the past, a medical clinic found that 40% of its patients had illnesses of a psychosomatic nature. A psychologist employed by the clinic wants to see if the percentage has decreased. To see if there is support for a decrease in the 40% figure, the psychologist examines the records of a random sample of 80 of the clinic's patients and finds that 20 have illnesses of a psychosomatic nature. Based on the sample results, would you conclude that the 40% figure has decreased? Use a = .10.

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step-by-step explanatio89

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step-by-step explanation:

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

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