Use tables or software to find these probabilities. a. A medical test produces a score that measures the risk of a disease. In healthy adults, the test score is normally distributed with  points and ....

Use tables or software to find these probabilities.

a. A medical test produces a score that measures the risk of a disease. In healthy adults, the test score is normally distributed with
 points and
. Lower scores suggest the disease is present. Test scores below what threshold would signal a problem for only 1% of healthy adults?
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b. A contract requires that 90% of packages must weight between 100 and 104 grams. If the average weight of a manufacturer’s packages is 102 grams, what does the contract require of its standard deviation if the weights are normally distributed?
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