Question

Near the city of Salamanca in Spain, there is an extremely poor indigenous population. The volunteer...

Near the city of Salamanca in Spain, there is an extremely poor indigenous population. The volunteer doctors who help these people suspect that this population suffers from diseases caused by leukopenia (Decreased white blood cells). The last 10 patients showed white blood cell levels of 4.64, 4.34, 5.32, 4.99, 3.98, 4.53. 4.82, 6.29, 4.35 and 4.12 (mm^8).

a)If historical information assumes a standard deviation of 1.0mm^8. Construct a 95% confidence interval for the expected value of the current white blood cell levels of this population.

b)Explain in your own words what does it mean? this confidence interval?

c)To impact the health of the population, doctors recommend providing foods such as beets, lettuce and carrots since they help raise white blood cells. If low levels are classified for values ​​less than 4.0/mm^8.
Is it a good suggestion from doctors to modify the diet or can it be a waste of money and effort?

Homework Answers

Answer #1

1)
sample mean, xbar = 4.738
sample standard deviation, σ = 1
sample size, n = 10


Given CI level is 95%, hence α = 1 - 0.95 = 0.05
α/2 = 0.05/2 = 0.025, Zc = Z(α/2) = 1.96


ME = zc * σ/sqrt(n)
ME = 1.96 * 1/sqrt(10)
ME = 0.62

CI = (xbar - Zc * s/sqrt(n) , xbar + Zc * s/sqrt(n))
CI = (4.738 - 1.96 * 1/sqrt(10) , 4.738 + 1.96 * 1/sqrt(10))
CI = (4.12 , 5.36)


2)

we are 95% confident that the current white blood cell levels of this population. is between 4.12 and 5.36

3)

yes, it is a good suggestion from doctors because confidence interval does not contain 4

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Near the city of Lima in Peru, there is an extremely poor indigenous population. The volunteer...
Near the city of Lima in Peru, there is an extremely poor indigenous population. The volunteer doctors who help these people suspect that this population suffers from diseases caused by leukopenia (Decreased white blood cells). The last 10 patients showed white blood cell levels of 4.64, 4.34, 5.32, 4.99, 3.98, 4.53. 4.82, 6.29, 4.35 and 4.12 (mm^8). 1. If historical information assumes a standard deviation of 1.0 / mm^8. Construct a 95% confidence interval for the expected value of the...
Near the city of Santo Domingo in Ecuador, there is a population indigenous of extreme poverty....
Near the city of Santo Domingo in Ecuador, there is a population indigenous of extreme poverty. The volunteer doctors who help these people suspect that this population suffers from diseases due to leukopenia (decreased white blood cells). The last 10 patients showed white blood cell levels of 4.64, 4.34, 5.32, 4.99, 3.98, 4.53, 4.82, 6.29, 4.35 and 4.12 (/ mm8). 1. If historical information assumes a standard deviation of 1.0 / mm8.Build a 95% confidence interval for the expected value...
Near the city of Santo Domingo in Ecuador, there is a population indigenous of extreme poverty....
Near the city of Santo Domingo in Ecuador, there is a population indigenous of extreme poverty. The volunteer doctors who help these people suspect that this population suffers from diseases by leukopenia (Decreased white blood cells). The last 10 patients showed white blood cell levels of 4.64, 4.34, 5.32, 4.99, 3.98, 4.53, 4.82, 6.29, 4.35 and 4.12 (/ mm8 ). 1. If historical information assumes a standard deviation of 1.0 / mm8 . Build a 95% confidence interval for the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT