Based on a study by Dr. P. Sorita Soni at Indian University, we know that the ey

Question

Based on a study by Dr. P. Sorita Soni at Indian University, we know that the eye colors in the United states are distributed as follows: 40% brown, 35% blue, 12% green, 7% gray, and 6% hazel. A) A statistics instructor collects eye color data from her students. What is the name of this Sampling are method? B) Identify one factor that might make this particular Sample biased and not representative of the general population of people In the United States. One person is randomly selected, what is the probability that this person will have brown or blue eyes? Express the probability as a decimal people are randomly selected, what is the probability that at least them has brown eyes? Express the probability as a decimal value Show your work. Final answers only will not be graded.

Explanation / Answer

A) This is a case of stratified sampling , where the strata could be occupation of the person : in this case student

B) This sample is not representative of the entire population of the USA because of sevral factors

Age of students will not represent populaiton in general , Students themselves are not representative of all occupations , also the geographical location of the school might not encompass people from all states of USA

C) Probability of broan is 0.4 , as we are given pecentages

Probability of blue eyes is 0.35

so total probability as it is an OR : so we add then 04+0.35 = 0.75

D ) Incomplete question, image is truncated on the left !!

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