Social Studies, 03.03.2020 16:27 marioagundis09

The Jones family was one of the first to come to the U. S. They had 4 children. Assuming that the probability of a child being a girl is .5, find the probability that the Jones family had:.
(a) at least 3 girls
(b) at most 3 girls

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Answer from: cassiemyers60

a) The probability that the Jones family had at least 3 girls is 0.3125.

b) The probability that the Jones family had at most 3 girls is 0.9375.

Explanation:

The probability that the Jones family had at least 3 girls is obtained below:

From the given information, let X be the number of girls follows binomial distribution with number of trails 4 and probability of success is 0.5. Jones having four children. The 0.5 probability that having girl.That is, and p=0.50The probability mass function of X is ; P (X = x) = 4Cx X (0.5)^x X (1 - 0.5)^4-x

a) P(At least 3 girls) = P(3 girls) + P(4 girls)

= 4C3 x (0.5)^3 x (0.5)^1 + (0.5)^4

= 0.3125 is the probability that the Jones family had at least 3 girls

b) at most 3 girls ; The probability that the Jones family had at most 3 girls is obtained below:

From the given information, let X be the number of girls follows binomial distribution with number of trails 4 and probability of success is 0.5. and .The probability mass function of X is, P (X = x) = 4Cx X (0.5)^x X (1 - 0.5)^4-xThe required probability is P(x<=3) = 1 - P(X>3) = 1 - P(X = 4)= 1 - 0.0625

The probability that the Jones family had at most 3 girls is 0.9375.

Answer from: Quest

elizabeth loftus conducted a study to observe the reliability of eyewitnesses during the 1970s. their baseline was to define how accurate are the recollections of eyewitnesses.

her studies do not support the use of eyewitness. loftus mentions in her work that we are not required to recall some experiences, meaning that rarely an individual eyewitness testimony is trustworthy. a good example is presented in her work, where all individuals watched a video and were than asked "about how fast were the cars going when they hit/smash? ". the testimonies changed based on the word she used to make the question (hit or smash), proving the fragility.

Answer from: Quest

answer; /// i believe that the correct answer is(

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The Jones family was one of the first to come to the U. S. They had 4 children. Assuming that the pr...

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