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 and depends on a single gene that codes for a taste receptor on the tongue. interestingly, though the ptc molecule is not found in nature, the ability to taste it correlates strongly with the ability to taste other naturally occurring bitter substances, many of which are toxins. about 75 % of italians can taste ptc. you want to estimate the proportion of americans with at least one italian grandparent who can taste ptc. (a) starting with the 75 % estimate for italians, how large a sample must you collect in order to estimate the proportion of ptc tasters within ± 0.11 with 95 % confidence

Sample size shouldbe atleast 60

Step-by-step explanation:

Given that 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 and depends on a single gene that codes for a taste receptor on the tongue. Interestingly, though the PTC molecule is not found in nature, the ability to taste it correlates strongly with the ability to taste other naturally occurring bitter substances, many of which are toxins.

Proportion of Italians who taste PTC =0.75

Margin of error <0.11

Confidence level = 95%

Std error of proportion =

Margin of error = <0.11

Sample size shouldbe atleast 60

step-by-step explanation:

dong do iy iys a scram

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest