PROBABILITY
Message posted by jimmy (via 64.12.106.48) on July 8, 2001 at 12:14 PM (ET)

I am having great difficulty with following problem -- any and all help would be greatly appreciated. PLEASE HELP

Suppose you have a normal distribution of I.Q. scores with a mean of 100 and a standard deviation of 15. If you were to randomly select 1 score from this distribution, the probability that you would draw:
a) a score less than 100
b)A score greater than 100
c) A score greater than 115

A Random sample of 175 people were asked whether or not they always stop completely at stop signs. Seventy-five percent responded that they do not.
a)What is the standard error of the proportion
b) Estimate the population proportion with a 95% confidence interval
c) Estimate the population proportion with a 99% confidence interval

THANKS for BAILING ME OUT!

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Re: PROBABILITY
Message posted by JG (via 128.8.23.152) on July 8, 2001 at 4:46 PM (ET)

.o33,.69to.81,.66to.84