Question
In: Statistics and Probability
About 60% of adults use cash for payments. Suppose four adults were randomly selected. a. What...
About 60% of adults use cash for payments. Suppose four adults were randomly selected. a. What kind of probability is this? Explain why. b. What is the probability that one of the adults use cash for payments? c. What is the probability that more than three adults use cash for payments? d. What is the mean and variance? Interpret your results.
Solutions
orchestra answered 2 years agoRelated Solutions
Assume that adults were randomly selected for a poll. They were asked if they "favor or...
Assume that adults were randomly selected for a poll. They were
asked if they "favor or oppose using federal tax dollars to fund
medical research using stem cells obtained from human embryos." Of
those polled, 485 were in favor, 402 were opposed, and 125 were
unsure. A politician claims that people don't really understand the
stem cell issue and their responses to such questions are random
responses equivalent to a coin toss. Exclude the 125 subjects who
said that they...
Assume that adults were randomly selected for a poll. They were asked if they "favor or...
Assume that adults were randomly selected for a poll. They were
asked if they "favor or oppose using federal tax dollars to fund
medical research using stem cells obtained from human embryos." Of
those polled,489 were in favor, 395 were opposed, and 115 were
unsure. A politician claims that people don't really understand
the stem cell issue and their responses to such questions are
random responses equivalent to a coin toss. Exclude the 115
subjects who said that they were...
Assume that adults were randomly selected for a poll. They were asked if they "favor or...
Assume that adults were randomly selected for a poll. They were
asked if they "favor or oppose using federal tax dollars to fund
medical research using stem cells obtained from human embryos." Of
those polled, 488 were in favor, 402 were opposed, and 117 were
unsure. A politician claims that people don't really understand
the stem cell issue and their responses to such questions are
random responses equivalent to a coin toss. Exclude the subjects
who said that they were...
Assume that adults were randomly selected for a poll. They were asked if they "favor or...
Assume that adults were randomly selected for a poll.
They were asked if they "favor or oppose using federal tax dollars
to fund medical research using stem cells obtained from human
embryos." Of those polled, 488 were in favor, 399 were opposed,
and 121 were unsure. A politician claims that people don't really
understand the stem cell issue and their responses to such
questions are random responses equivalent to a coin toss. Exclude
the 121 subjects who said that they...
Assume that adults were randomly selected for a poll. They were asked if they "favor or...
Assume that adults were randomly selected for a poll. They were
asked if they "favor or oppose using federal tax dollars to fund
medical research using stem cells obtained from human embryos." Of
those polled,
483483
were in favor,
402402
were opposed, and
115115
were unsure. A politician claims that people don't really
understand the stem cell issue and their responses to such
questions are random responses equivalent to a coin toss. Exclude
the
115115
subjects who said that they...
Assume that adults were randomly selected for a poll. They were asked if they "favor or...
Assume that adults were randomly selected for a poll. They were
asked if they "favor or oppose using federal tax dollars to fund
medical research using stem cells obtained from human embryos." Of
those polled,
484484
were in favor,
395395
were opposed, and
118118
were unsure. A politician claims that people don't really
understand the stem cell issue and their responses to such
questions are random responses equivalent to a coin toss. Exclude
the
118118
subjects who said that they...
Assume that adults were randomly selected for a poll. They were asked if they "favoror oppose...
Assume
that adults were randomly selected for a poll. They were asked if
they "favoror oppose using federal tax dollars to fund medical research
using stem cells obtained from human embryos."Of those polled,490were
in favor,396were opposed,and
123were unsure.
A politician claims that people don'treally understand
the stem cell issue and their responses to such questions are
random responses equivalent to a coin toss. Exclude the
123subjects who
said that they were unsure,and use a
0.05
significance level
to test the...
In a survey of 1000 randomly selected adults in the United States, participants were asked what...
In a survey of 1000 randomly selected adults in the United
States, participants were asked what their most favorite and what
their least favorite subject was when they were in school
(Associated Press, August 17, 2005). In what might seem like a
contradiction, math was chosen more often than any other subject in
both categories! Math was chosen by 228 of the 1000 as the favorite
subject, and it was also chosen by 366 of the 1000 as the least...
In a survey of 1000 randomly selected adults in the United States, participants were asked what...
In a survey of 1000 randomly selected adults in the United
States, participants were asked what their most favorite and what
their least favorite subject was when they were in school
(Associated Press, August 17, 2005). In what might seem like a
contradiction, math was chosen more often than any other subject in
both categories! Math was chosen by 222 of the 1000 as the favorite
subject, and it was also chosen by 362 of the 1000 as the least...
A recent study shows that 18% of adults in the US do not use the Internet. Suppose that 12 adults are randomly selected in the US.
A recent study shows that 18% of adults in the US do not use the Internet. Suppose that 12 adults are randomly selected in the US.
a)Construct the PMF of X, the number of adults who don't use internet in this group.
b)What is the expected value and standard deviation of X?
c)What is the probability that at least 1 of the adults uses the Internet?
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