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ASK THE PROFESSOR FORUM

Course Documents

Chapter 1 - Intro

Chapter 2 - Methods for Describing Sets of Data

Chapter 3 - Probability

Chapter 4 - Discrete Random Variables

Chapter 5 - Normal Random Variables

Chapter 6 - Sampling Distributions

Chapter 7 - Confidence Intervals

Chapter 8 - Tests of Hypothesis: One Sample

Chapter 9 - Confidence Intervals and Hypothesis Tests: Two Samples

Sample Exam I: Chapters 1 & 2

Sample Exam II: Chapters 3 & 4

Sample Exam III: Chapters 5 & 6

Sample Exam IV: Chapters 7 & 8

Ask the Professor Forum

hi professor, im having some trouble with a binomial random variable question and I was hoping that you could clarify. the problem is as follows P(170 less than equal to x less than 180) when n = 600 p = .3 I know that the mean is 180 and the standard dev. is 11.2249
but is it as simple as just finding the area from 170 to the mean or am I over simplifying ?

Posted to STATS 1 on Thursday, July 2, 2015   Replies: 2


.
07/03/2015
12:03 PM EST
thanks professor, that helped a lot and that analogy was spot on.

just for some extra clarification, if the problem did not want to include 170 would i then have to add .5 to 170 instead?

Professor Mcguckian
07/03/2015
1:05 PM EST

That's correct Jose! You would add the 0.5 to avoid taking any of the 170 when you calculated the area.

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