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Lecture Comments (2)

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Post by Mohammed Alhamoud on March 13, 2013

i have question
the serum cholesterol level x in 14 years old boys has approximately a normal distribution with mean 170 and standard deviation 30.a-find the probability that the serum cholesterol level of a randomly chosen 14 years old boy exceeds 230?b- in a middle school there are 300 14 years old boys . find the probability that at least 10 boys have a serum cholesterol level that exceeds 230?c- what is the cholesterol level of 14 years old boys above which there is 10 percent of this population?

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Post by JOSEPH MORGAN on December 18, 2011

a researcher finds a significant interaction between type of course (Computer v. non computer)and content area (english V. math ) on achievement scores. partial eta. squared was .23

the researcher did what type of hypothesis test why explain this in the context of the variables studided and level of measurement used

what kind of effect did the interaction have

Random Variables

  • Random variables are variables whose values are determined by the outcome of a random experiment.

  • Discrete random variables take on countable values.

  • Continuous random variables take on any value contained in one or more intervals.

Random Variables

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Definition 0:06
    • Example
  • Discrete Random Variables 1:22
    • Example
  • Continuous Random Variable 3:53
    • Example
  • Extra Example 1