A Method Currently Used by Doctors to Screen Women for Possible

question 66

Essay

A method currently used by doctors to screen women for possible breast cancer fails to
detect cancer in 15% of women who actually have the disease. A new method has been
developed that researchers hope will be able to detect cancer more accurately. A random
sample of 80 women known to have breast cancer were screened using the new method.
Of these, the new method failed to detect cancer in 9. Calculate the test statistic used by
the researchers for the corresponding test of hypothesis.

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