Question

6.) Assume that 15% of the people in your expedition trip own a mobile phone, and you are randomly assigned to two partners in your group. Find the probability that: a) The first partner will have a mobile phone b) The first partner will not have a mobile phone c) That both partners have a mobile phone d) That at most one will have a mobile phone

7.) The following contingency table shows U.S. Adults, broken down by political party affiliation: Nonissue Serious Concern Total Democratic 85 415 500 Republican 290 210 500 Independent 70 130 200 Total 445 735 1,200 a) What is the probability that a U.S adult selected at random believes that global warming is a serious concern? b) What type of probability did you find in part a? c) What is the probability that a U.S. adult selected at random is a Republican and believes that global warming is serious issue? d) What type of probability did you find in part c?

9.) Using the table from problem 7: a) What is the probability that a randomly selected U.S. adult who is a Republican believes that global warming is a serious issue? b) What is the probability that a randomly selected U.S. adult is a Republican given that he or she believes that global warming is a serious issue? c) What is the probability that a randomly selected U.S. adult is a Democrat and has serious concern for global warming?

12.) Facebook reports that 70% of their users are from outside of the United States and that 50% of their users log on to Facebook every day. Suppose 20% of their users are United States users log on every day. a) What percentage of Facebook’s users are from the United States? b) What type of probability is the 20% mentioned above? c) Construct a contingency table showing all the joint and marginal probabilities. d) What is the probability that a user is from the United States given that he or she logs on every day? e) Are From the United States and Log on Every Day independent? Explain

33.) In a sample of real estate ads, 64% of homes for sale had garages, 21% have swimming pools, and 17% have both features. What is the probability that a home for sale has: a) A pool, a garage, or both? b) Neither a pool nor a garage? c) A pool but no garage?

please explain how you did each one as i am really lost on these thank you so much

Answer #1

SOLUTION 6:Let first partner = A and second partner = B

a The probability that the first partner will have mobile phone

Answer: P (A) = 0.15

b) The probability that the first partner won’t have mobile phone

Answer:1-P (A) =1-0.15=0.85

c) The probability that both will have mobile phones

Answer:P (A∩B) = P (A) P (B|A) = 0.15*0.15=0.0225

d) The probability that at most one will have a mobile phone

Answer:P (A∪B) = P (A) + P (B) – P (A∩B) =0.15+0.85-(0.225) =1-0.0225= 0.9775

NOTE: AS PER THE GUIDELINES I HAVE DONE THE FIRST PLEASE RE POST THE REST. THANK YOU.

please explain and show ur work thank you so much
Using the table Opinion on Global Warming Nonissue Serious
Concern Total Political Party Democratic 85 415 500 Republican 290
210 500 Independent 70 130 200 Total 445 755 1200
, a) What is the probability that a randomly selected U.S. adult
who is a Republican believes that global warming is a serious
issue? b) What is the probability that a randomly selected U.S.
adult is a Republican given that he...

please show your work and explain how you did it thank you so
much
Assume that 15% of the people in your expedition trip own a
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