Arecent survey of 50 executives who were laid off during a recent recession revealed it took a mean of 26 weeks for them to find another position. the standard deviation of the sample was 6.2 weeks. construct a 95% confidence interval for the population mean. is it reasonable that the population mean is 28 weeks? justify your answer.

Formula to find the confidence interval for population mean :-

, where = sample mean.

t*= critical z-value

n= sample size.

s= sample standard deviation.

By considering the given question , we have

n= 50

Degree of freedom : df = 49  [ df=n-1]

Significance level :

Using students's t-distribution table, the critical t-value for 95% confidence =

Then,  95% confidence interval for the population mean will be :

Hence, a 95% confidence interval for the population mean = (24.24, 27.76)

Since 28 is not contained in the above confidence interval , it means it is not reasonable that the population mean is 28 weeks.

-2 is the right

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.