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Assume that hybridization experiments are conducted with peas having the property that for offspring, there is a 0.75 probability that a pea has green pods. Assume that the offspring peas are randomly selected in groups of 20.

Assume that hybridization experiments are conducted with peas having the property-example-1
User Zhile Zou
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19 votes
19 votes

Given:

probability = p = 0.75

sample size = no. of peas = n = 20

A.) The mean of a binomial distribution is the product of the sample size n and the probability p.


\text{ }\mu\text{ = np}

We get,


\text{ }\mu\text{ = \lparen20\rparen\lparen0.75\rparen = 15}

Therefore, the mean is 15.

B.) The standard deviation of a binomial distribution is the square root of the product of the sample size, n, and the probability, p.


\text{ }\sigma\text{ = }√(npq)\text{ = }\sqrt{np(1\text{ - p\rparen}}

We get,


\text{ }\sigma\text{ = }\sqrt{20(0.75)(1\text{ - 0.75\rparen}}
\text{ }\sigma\text{ = 3.75}

Therefore, the standard deviation is 3.75

User Juan Martin Zabala
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