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Author Question: Which of the following is not true for a normal distribution? A) The curve for a normal ... (Read 91 times)

jho37

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Which of the following is not true for a normal distribution?
 
  A) The curve for a normal distribution is symmetric.
  B) One-third of the total area falls above the mean.
  C) The tails of the distribution extend to negative and positive infinity.
  D) 99 of the area lies within 3 standard deviations of the mean.

Question 2

The standard deviation for the checking account balances is assumed known to be 357.50. Recently, a bank manager was interested in estimating the mean balance.
 
  To do this, she selected a random sample of 81 accounts and found a mean balance of 1,347.20. At a 95 percent confidence level, the lower limit for the confidence interval is 646.50. Indicate whether the statement is true or false


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C.mcnichol98

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jho37

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Reply 2 on: Jun 24, 2018
:D TYSM


samiel-sayed

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

 

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