SOLUTION: Consider a large population of scores from a bimodal distribution with mean μ = 64 and standard deviation σ = 16. Imagine that you randomly selected a sample from that po
Algebra.Com
Question 457120: Consider a large population of scores from a bimodal distribution with mean μ = 64 and standard deviation σ = 16. Imagine that you randomly selected a sample from that population that contained 47 scores. What is the PROBABILITY that the mean of the sample is above 70?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Consider a large population of scores from a bimodal distribution with mean μ = 64 and standard deviation σ = 16. Imagine that you randomly selected a sample from that population that contained 47 scores. What is the PROBABILITY that the mean of the sample is above 70?
-------------------
t(70) = (70-64)/[16/sqrt(47)] = 2.5709
------
P(x-bar > 70) = P(t > 2.5709 when df 46) = 0.0067
===================================================
Cheers,
Stan H.
RELATED QUESTIONS
15. A population has a mean μ = 90 and a standard deviation σ = 27. Find the... (answered by stanbon,ewatrrr)
Suppose that a random sample of size 64 is to be selected from a population with mean 40... (answered by stanbon)
Need help with standard deviation, please!
Suppose x has a normal distribution with mean (answered by rothauserc)
A population has a mean μequals=76 and a standard deviation σ=24. Find the mean (answered by oscargut)
A population has a mean μ=76 and a standard deviation σ=24. Find the mean and... (answered by Boreal)
There are two major tests of readiness for college, the ACT and the SAT. ACT scores are... (answered by Boreal)
Consider H0: μ=72 versus H1: μ>72. A random sample of 16 observations taken... (answered by Boreal)
There are two major tests of readiness for college, the ACT and the SAT. ACT scores are... (answered by Theo)
There are two major tests of readiness for college, the ACT and the SAT. ACT scores are... (answered by Boreal)