SOLUTION: Focus groups of 14 people are randomly selected to discuss products of the Yummy Company. It is determined that the mean number (per group) who recognize the Yummy brand name is 8.
Algebra.Com
Question 263229: Focus groups of 14 people are randomly selected to discuss products of the Yummy Company. It is determined that the mean number (per group) who recognize the Yummy brand name is 8.9, and the standard deviation is 0.69. Would it be unusual to randomly select 14 people and find that greater than 12 recognize the Yummy brand name?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Focus groups of 14 people are randomly selected to discuss products of the Yummy Company.
It is determined that the mean number (per group) who recognize the Yummy brand name is 8.9, and the standard deviation is 0.69.
Would it be unusual to randomly select 14 people and find that greater than 12 recognize the Yummy brand name?
------------------------------------------
z(12) = (12-14)/0.69 = -2.8986
---
P(xbar > 12) = P(z > -2.8986) = 0.9981
---
It would not be at all unusual to find that greater than 12
recognize the brand name.
==================================
Cheers,
Stan H.
RELATED QUESTIONS
A survey for brand recognition is done and it is determined that 70% of
consumers have... (answered by dfrazzetto)
a candy company claims that 15% of its plain candies are orange, and a sample of 100 such (answered by stanbon)
A manufacturer knows that 11% of the products it produces are defective. Find the... (answered by ikleyn)
HELP PLEASE !!!
A telephone company survey of 600 randomly selected people determined... (answered by jim_thompson5910)
If boys and girls are equally likely and groups of 400 births are randomly selected, what (answered by edjones)
About 4% of the population has a particular genetic mutation. 500 people are randomly... (answered by ikleyn)
About 10% of the population has a particular genetic mutation. 600 people are randomly... (answered by ikleyn)
About 9% of the population has a particular genetic mutation. 800 people are randomly... (answered by Boreal)
About 5% of the population has a particular genetic mutation. 400 people are randomly... (answered by ikleyn)