First time I have ever been stumped

#1
Hey there guys, I love stats and this is my third year of it in high school. I received these two questions from a friend of mine and no one can get the correct anwser. Can you guys help!!!

Publishing scientific papers online is fast, and the papers can be long. Publishing in a paper journal means that the paper will live forever in libraries. The British Medical Journal combines the two it prints short and readable versions, with longer versions available online. Is this OK with authors? The Journal asked a random sample of 104 of its recent authors several questions.

One Question in the survey asked whether authors would accept a stronger move toward online publishing. As an author, how acceptable would it be for us to publish only the abstract of papers in the paper journal and continue to put the full long version on our website? Of the 104 authors in the sample 65 said not at all acceptable

1)Do the data provide good evidence that more than half of all authors feel that abstract only publishing is not acceptable?
2)What proportion of all authors feel that abstract only publishing in not acceptable (estimate with 95? confidence interval).
 

CowboyBear

Super Moderator
#2
1)Do the data provide good evidence that more than half of all authors feel that abstract only publishing is not acceptable?
Well, is publishing an abstract in print and the full version online "abstract only publishing"? If so, then I'd probably say "yeah-ish", it provides fairly decent evidence that more than half (of at least recently published authors) think it isn't acceptable.

2)What proportion of all authors feel that abstract only publishing in not acceptable (estimate with 95? confidence interval).
Aside from the definitional issue, this is just a basic confidence interval problem, it's 53.2 - 71.8% I believe.
 
#3
a. It's just a 1-proportion z-test.

H0: p = .5
HA: p > .5

you should get a z-score of 2.5495 and a p-value of .0054, meaning that you go with the alternate.

b.like cowboy bear said, it's (0.5320,0.7180). Just a 1-proportion z interval.