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Author Question: A population has a mean of 100 and a standard deviation of 15. If samples of size N= 25 are ... (Read 54 times)

RYAN BANYAN

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  • Posts: 563
on: Jun 20, 2018
A population has a mean of 100 and a standard deviation of 15. If samples of size N= 25
  are randomly drawn from this population, then what proportion of sample means will fall
  between 97 to 103?
 
  a. .6826
  b. .3413
  c. .5000
  d. .9544

Question 2

Assume that intelligence test scores are approximately normally distributed with a mean
  of 100 and a standard deviation of 16. Thus, about _____ percent of the people have IQ
  scores _____ .
 
  a. 50; between 100 and 116
  b. 50; higher than 116
   c. 68; between 84 and 116
  d. 34; lower than 100


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TheDev123

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Reply #1 on: Jun 20, 2018
Answer to Question 1

A

Answer to Question 2

C


RYAN BANYAN

  • Member
  • Posts: 563
Reply 2 on: Jun 20, 2018
YES! Correct, THANKS for helping me on my review

xiaomengxian

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  • Posts: 311
Reply 3 on: Yesterday
Wow, this really help

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