A manufacturer evaluates a new pregnancy test. The manufacturer enlists 500 study subjects, 190 pregnant females (of whom 150 had a positive test) and 310 nonpregnant females (of whom 296 had a negative test).
Positive Test
Negative Test
Pregnant
150
40
Non-Pregnant
14
296
Calculate the predictive value for a positive test.
A) 79
B) 88
C) 91
D) 95
Question 2
All of the following are true statements about nonparametric methods of normal range determination EXCEPT:
A) Nonparametric methods require a larger number of samples to estimate the normal range with accuracy than do parametric methods.
B) Outlying values influence the normal range more than for parametric methods.
C) A Gaussian distribution is required to utilize the nonparametric approach.
D) The nonparametric approach makes no assumption as to distribution.
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