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Author Question: The SAT scores have an average of 1200 with a standard deviation of 60 . A sample of 36 scores is ... (Read 270 times)

ericka1

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on: Jun 24, 2018
The SAT scores have an average of 1200 with a standard deviation of 60 . A sample of 36 scores is selected.
 a. What is the probability that the sample mean will be larger than 1224?
  b. What is the probability that the sample mean will be less than 1230?
  c. What is the probability that the sample mean will be between 1200 and 1214?
  d. What is the probability that the sample mean will be greater than 1200?

Question 2

All of the following variable selection procedures are heuristics except
 a. forward selection.
 b. backward elimination.
 c. best-subsets regression.
  d. stepwise regression.


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perkiness

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

a. 0.0082
b. 0.9986
c. 0.4192
d. 0.5
e. 1.0

Answer to Question 2

c


ericka1

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Reply 2 on: Jun 24, 2018
Wow, this really help

parshano

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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