SOLUTION: I need help with my statistics class. Can someone please help me with this? Thanks As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels

Question 186936: I need help with my statistics class. Can someone please help me with this? Thanks
As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. There were 86.
(a) Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
(b) Check the normality assumption.
(c) Try the Very Quick Rule.
Does it work well here?
Why, or why not?
(d) Why might this sample not be typical?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. There were 86.
(a) Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
---
sample proportion: 86/773 = 0.11 ;Sample standard deviation: sqrt(0.11*0.89/773)
= 0.011
E = 1.645*0.0113 = 0.0186
-----------------------
90% CI: 0.11-0.0186 < p < 0.11+0.0186
----
(b) Check the normality assumption.
pn >5 and qn >5
----------
(c) Try the Very Quick Rule.
I'm not sure what that is.
-----------------
Does it work well here?
Why, or why not?
--------------------------------
(d) Why might this sample not be typical?
The sample might not be representative of the population.
===============================================================
Cheers,
Stan H.

RELATED QUESTIONS
Please help with part (a). I understand that I need to use a students t bar but my... (answered by stanbon)

I need some help please, I've searched the website and I'm not finding this answer. NO... (answered by stanbon)

Can someone please help me simplify this problem I am failing my class .Thanks A... (answered by bucky)

Can someone help me with this problem? I need to write 0.21 as a percent.... (answered by adamchapman)

Can someone help me with this problem? I need to write 0.06 as a percent.... (answered by Nate)

Solve {{{(a)-(5)/(a)=4}}} Please can someone help me with this . I really need it.... (answered by josgarithmetic)

I need help with an example of a function and then I need help defining it. Can someone... (answered by venugopalramana)

I am in need of some help, this is my first statistics class and we are in the second... (answered by stanbon)

Can someone please help me with this problem? I need to find the prime factorization (answered by checkley71)