× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Science-Related Homework Help Mathematics
New Topic  
Boobers87 Boobers87
wrote...
solved
Posts: 21
Rep: 8 0
8 years ago
The following data were obtained from a survey of college students. The variable X represents the number of non-assigned books read during the past six months.


x
 
0
 
1
 
2
 
3
 
4
 
5
 
6
 

P (X=x)
 
0.55
 
0.15
 
0.10
 
0.10
 
0.04
 
0.03
 
0.03
 


 Find P(X > 0). Place your answer, rounded to two decimal places in the blank.
Read 3038 times
1 Reply

Related Topics

Replies
wrote...
#1
8 years ago
Similar Question
The following data were obtained from a survey of college students. the variable x represents the number of non assigned books read during the past six months.
0=.20
1=.25
2=.20
3=.15
4=.10
5=.10

a) Find P(1<x<5)

b)P(x<3 or x >4)

(Part B is supposed to say: P x is less than 3 or x is greater than or equal to 4)

Answer:

Since the probabilities mentioned above do not overlap (ie one student cannot have both 0 and 1 book), you can simply add the probabilities.
For a)
P(1<x<5) = P(x=1) + P(x=2) + P(x=3) + P(x=4) + P(x=5)
= .25 + .20 + .15 + .10 + .10
= .80
For b)
P(x<3) = P(x=0) + P(x=1) + P(x=2)
= .20 + .25 + .20
= .65
P(x>=4) = 1 - P(x<3)
= 1 - .65
= .35
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1248 People Browsing
 124 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 294
  
 356
  
 686
Your Opinion
Where do you get your textbooks?
Votes: 372
Previous poll results: Which industry do you think artificial intelligence (AI) will impact the most?