Month Wise Foreign Tourist Arrivals in India (january 2003- December 2015)
Autor: Sharon • November 22, 2018 • 1,804 Words (8 Pages) • 483 Views
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- What is the probability that a randomly selected viewer will rate the new show below average or worse?
Ans. The probability that a randomly selected viewer will rate the show as average or worse is 0.24
Page 209/Q-50
A survey showed that 8% of Internet users age 18 and older report keeping a blog. Referring to the 18-29 age group as young adults, the survey showed that for bloggers 54% are young adults and for non-bloggers 24% are young adults.
- Develop a joint probability table for these data with two rows and two columns
Young Adults(a)
Adults(b)
Total
Bloggers (x1)
0.0432
0.0368
0.08
Non-Bloggers(x2)
0.2208
0.6992
0.92
Total
0.264
0.736
1
Ans.
- What is the probability that an Internet user is a young adult?
Ans. P(Internet user is a young adult)= 0.264
- What is the probability that an internet user keeps a blog and is a young adult?
Ans. P(internet user keeps a blog and is a young adult) = 0.0432
- Suppose that in a follow-up phone survey we contact someone who is 24 years old. What is the probability that this person keeps a blog?
Ans. Probability = 0.163636364[pic 5]
Question 3.
Combination 1 (n = 5, x = 1, range for p = [0.1, 0.6]
p
0.1
0.2
0.3
0.4
0.5
0.6
Prior
0.05
0.15
0.2
0.3
0.2
0.1
[pic 6]
Combination 2 (n = 10, x = 2, range for p = [0.1, 0.9]
p
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Prior
0.05
0.15
0.19
0.1
0.14
0.1
0.07
0.11
0.09
[pic 7]
Combination 3 (n = 15, x = 3, range for p = [0.3, 0.6]
p
0.3
0.35
0.4
0.45
0.5
0.55
0.6
Prior
0.08
0.15
0.18
0.22
0.2
0.11
0.05
[pic 8]
Combination 4 (n = 20, x = 4, range for p = [0.2, 0.9]
p
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Prior
0.05
0.02
0.15
0.23
0.15
0.08
0.21
0.11
[pic 9]
Combination 5 (n = 25, x = 1, range for p = [0.2, 0.9]
p
0.2
0.25
0.3
0.35
Prior
0.05
0.3
0.4
0.25
[pic 10]
Therefore, it can be observed for any combination of (n,x) where the ratio of x/n is same there is no significant change in
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