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a component in a music system has a life expectancy of 2400 hours with a standard deviation of 300 hours. if an average person listens to

music for 1,000 hours in a year, the probability that the component lasts for more than 3 years is

reset

ned

2019 ementum

seserved

0.0227

Step-by-step explanation:

Mean expectancy hours M = 2400 hours

Standard deviation S = 300 hours

Number of hours used per year = 1000 hours

Number of hours in 3 years N = 3*1000 = 3000 hours

Probability of lasting more than 3000 hours = 1 - Probability of lasting up to 3000 hours

P(z>3000) = 1 - P(z< 3000)

P(z<3000) = P[(N-M)/S < (3000-2400)/300 ]

P(z<3000) = P(z< 600/300)

P(z<3000) = P(z< 2) = ¢(2)

P(z<3000) = 0.9773

Therefore,

P(z>3000) = 1 - P(z<3000)

P(z>3000) = 1 - 0.9773

P(z>3000) = 0.0227

The probability of the component lasting more than 3 years (3000 hours) is 0.0227

a

b

d

step-by-step explanation:

there has been genes found in the x chromosome of males that have been linked to [homo/hetero]sexuality. in addition to the reign of the x chromosome, a section of chromosome 8 has also been link to, "alot of ppl are so " these facts were proven true after a 2014 study of a gay male and his strait brother. according to newscientist.com,"chromosome 14 and is mainly active in the thyroid, but also the brain. called tshr, it makes a type of receptor protein that recognises and binds to a hormone that stimulates the thyroid. in this way, the gene plays an important role in controlling thyroid function. the fact that tshr seems to be involved in sexual orientation fits with evidence that thyroid function seems to be linked to sexuality."

in conclusion, "ppl are so gay" due to their genetics.