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fitscarlet fitscarlet
wrote...
Posts: 404
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A year ago
A certain baseball player hits a home run in 3 of his at-bats. Consider his at-bats as
  independent events. How many home runs do we expect the baseball player to hit in 600
  at-bats?
 
  A) 3 B) 18 C) 17.46 D) 603

Q. 2

A certain baseball player hits a home run in 3 of his at-bats. Consider his at-bats as
  independent events. Find the probability that this baseball player hits at most 10 home runs in
  600 at-bats?
 
  A) 0.9633 B) 0.03 C) 0.97 D) 0.0367

Q. 3

A certain baseball player hits a home run in 7 of his at-bats. Consider his at-bats as
  independent events. Find the probability that this baseball player hits more than 42 home runs in
  800 at-bats?
 
  A) 0.93 B) 0.9693 C) 0.0307 D) 0.07

Q. 4

Transportation officials tell us that 90 of drivers wear seat belts while driving. What is the
  probability that between 525 and 530 drivers in a sample of 600 drivers wear seat belts?
 
  A) 0.0174 B) 0.0985 C) 0.9015 D) 0.0811

Q. 5

Transportation officials tell us that 80 of drivers wear seat belts while driving. What is the
  probability of observing 518 or fewer drivers wearing seat belts in a sample of 700 drivers?
 
  A) 0.2 B) approximately 1
  C) approximately 0 D) 0.8
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Replies
wrote...
A year ago
Ans. #1

B

Ans. #2

D

Ans. #3

B

Ans. #4

D

Ans. #5

C
wrote...
A year ago
Why did I have such a hard time with this?!? Thanks for clarifying
wrote...
A year ago
We all run into troubles, don't worry
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