Answers created by henriquepizarro

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• What do the standard deviation and the range tell you about a data set, as contrasted to what the mean tells you?
  
• What notation is used to designate the expected value of a random variable?
  
• Will you use a z table or a t table for computing the confidence interval for the slope?
  
• What is the importance of descriptive statistics?
  
• What are the 2 z values that identify the middle 50% of the standard normal distribution?
  
• Use the empirical rule to determine the approximate probability that a z value is between 0 and 1 on the standard normal curve.
  
• How is the law of large numbers related to probability?
  
• A discrete uniform distribution results from recording the final digit of the cell phone number for 3,000 students. In order to be a density curve, what would be the height (or probability) for each of the bars corresponding to the 10 possible outcomes of 0 to 9, inclusive?