× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
A
6
j
6
c
5
m
5
C
5
d
5
s
5
n
4
i
4
d
4
d
4
J
4
Home Q & A Board Science-Related Homework Help Mathematics
New Topic  
SnowQueen SnowQueen
wrote...
Posts: 777
Rep: 0 0
6 years ago
The makers of a soft drink want to identify the average age of its consumers. A sample of 16 consumers is selected. The average age in the sample was 22.5 years with a standard deviation of 5 years. Assume the population of consumer ages is normally distributed.
 a. Construct a 95 confidence interval for the average age of all the consumers.
  b. Construct an 80 confidence interval for the average age of all the consumers.
  c. Discuss why the 95 and 80 confidence intervals are different.
Read 36 times
1 Reply

Related Topics

Replies
wrote...
#1
6 years ago
a . 19.836 to 25.164
b. 20.824 to 24.176
c. As the level of confidence increases, the confidence interval gets wider.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  783 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 272
  
 341
  
 9424
Your Opinion
Where do you get your textbooks?
Votes: 422
Previous poll results: What's your favorite funny biology word?