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Author Question: The principal at Riverside High School would like to estimate the mean length of time each day that ... (Read 30 times)

sarasara

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on: Jul 24, 2018
The principal at Riverside High School would like to estimate the mean length of time each day that it takes all the buses to arrive and unload the students.
 
  How large a sample is needed if the principal would like to assert with 90 confidence that the sample mean is off by, at most, 7 minutes. Assume that s = 14 minutes based on previous studies. A) 11 B) 10 C) 12 D) 13

Question 2

Given events C and D with probabilities P(C) = 0.3, P(D) = 0.2, and P(C and D) = 0.1, are C and D independent?
 
  A) no B) yes C) cannot be determined


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stillxalice

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Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

A


sarasara

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Reply 2 on: Jul 24, 2018
Thanks for the timely response, appreciate it

nguyenhoanhat

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Reply 3 on: Yesterday
Wow, this really help

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