PTC is a substance that has a strong bitter taste for some people and is tasteless...
PTC is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inherited. About 75% of Italians can taste PTC, for example. You want to estimate the proportion of Americans with at least one Italian grandparent who can taste PTC.
Starting with the 75% estimate for Italians, how large a sample must you collect in order to estimate the proportion of PTC tasters within ±0.06 with 90 % confidence?
________(Give your answers as a whole number.)
Homework Answers
Sample size = Z2
/2
* p ( 1 - p) / E2
= 1.64492 * 0.75 * ( 1 - 0.75) / 0.062
= 140.9
Sample size = 141 (Rounded up to nearest integer)
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PTC is a substance that has a strong bitter taste for some
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