A Method Currently Used by Doctors to Screen Women for Possible

question 21

Essay

A method currently used by doctors to screen women for possible breast cancer fails to
detect cancer in 20% 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. Is the sample size sufficiently large
to conduct this test of hypothesis? Explain.

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Definitions:

Outstanding Stock

The total number of shares of a corporation's stock that are currently owned by all its shareholders, including share blocks held by institutional investors and restricted shares.

Incremental Value

The additional or extra value that is generated by undertaking a specific action, project, or investment compared to not doing so.

Outstanding Stock

The total number of shares of a corporation that have been issued and are currently owned by investors, including restricted shares.

Market Value

The current economic value at which transactions for assets or services are conducted in a marketplace.