Question

It is estimated 30% of all adults in United States invest in stocks and that 88% of U.S. adults have investments in fixed income instruments (savings accounts, bonds, etc.). It is also estimated that 25% of U.S. adults have investments in both stocks and fixed income instruments. (a) What is the probability that a randomly chosen stock investor also invests in fixed income instruments? Round your answer to 2 decimal places. (b) What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments? Round your answer to 2 decimal places.

Answer #1

It is estimated that 25% of all California adults are college
graduates and that 32% of California adults are regular internet
users. It is also estimated that 20% of California adults are both
college graduates and regular internet users. (a) What is the
probability that a California adult is an internet user, given that
he or she is a college graduate? Round your answer to decimal
places. (b) Among California adults, what is the probability that a
randomly chosen internet...

It is estimated that
27%
of all California adults are college graduates and that
31%
of California adults are regular internet users. It is also
estimated that
21%
of California adults are both college graduates and regular
internet users.
(a)Among California adults, what is the probability that a
randomly chosen internet user is a college graduate? Round your
answer to the nearest hundredth.
(b)What is the probability that a California adult is an
internet user, given that he or she...

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 240 of the 1000 as the favorite
subject, and it was also chosen by 368 of the 1000 as the least...

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 226 of the 1000 as the favorite
subject, and it was also chosen by 380 of the 1000 as the least...

A poll of 1350 adults
in the United States asked how much confidence they had in banks. A
total of 203 adults said they had a great deal of confidence. An
economist claims that less than 15% of U.S. adults have a great
deal of confidence in banks. Can you conclude that the economist's
claim is true? Use the α = 0.01 level of significance.
Fill in the blanks
State the null and
alternative hypothesis
Ho:
H1:
The test statistics...

In the country of United States of Heightlandia, the height
measurements of ten-year-old children are approximately normally
distributed with a mean of 55.6 inches, and standard deviation of
6.9 inches.
A) What is the probability that a randomly chosen child has a
height of less than 55.95 inches?
Answer=_____ (Round your answer to 3 decimal places.)
B) What is the probability that a randomly chosen child has a
height of more than 59.2 inches?
Answer= _____(Round your answer to 3...

In the country of United States of Heightlandia, the height
measurements of ten-year-old children are approximately normally
distributed with a mean of 56.4 inches, and standard deviation of
6.5 inches.
A) What is the probability that a randomly chosen child has a
height of less than 63.95 inches?
Answer= (Round your answer to 3 decimal places.)
B) What is the probability that a randomly chosen child has a
height of more than 72.8 inches?
Answer= (Round your answer to 3...

In the country of United States of Heightlandia, the height
measurements of ten-year-old children are approximately normally
distributed with a mean of 53.4 inches, and standard deviation of
6.4 inches.
A) What is the probability that a randomly chosen child has a
height of less than 51 inches?
Answer= (Round your answer to 3 decimal places.)
B) What is the probability that a randomly chosen child has a
height of more than 38.7 inches?
Answer= (Round your answer to 3...

In the country of United States of Heightlandia, the height
measurements of ten-year-old children are approximately normally
distributed with a mean of 56.4 inches, and standard deviation of
7.9 inches. A) What is the probability that a randomly chosen child
has a height of less than 64.95 inches? Answer= (Round your answer
to 3 decimal places.) B) What is the probability that a randomly
chosen child has a height of more than 49.8 inches? Answer= (Round
your answer to 3...

In the country of United States of Heightlandia, the height
measurements of ten-year-old children are approximately normally
distributed with a mean of 55.8 inches, and standard deviation of
5.4 inches. A) What is the probability that a randomly chosen child
has a height of less than 60.1 inches? Answer= (Round your answer
to 3 decimal places.) B) What is the probability that a randomly
chosen child has a height of more than 50.8 inches? Answer= (Round
your answer to 3...

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