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Owner: lpyott
 
Group:
MAT121 Spring 2019 Pyott
 
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quiz 2
Review for exam 2
  1. The number of coins in your pocket is a discrete or continuous random variable?
      Discrete
      Continuous
  2. For a standard normal random variable z, find P(z>-1.24).
      .107
      .124
      .893
  3. It is known for a particular EMS station that the mean response time to emergency calls follows and normal distribution with a mean of 7.5 minutes and a standard deviation of 2.5 minutes. What is the probability that a randomly selected EMS call has response that exceeds 9 minutes?
      .274
      .727
      .159
  4. When we take a numerical summary from a sample, it's called a
      Parameter
      Statistic
  5. We are interested in describing the sampling distribution of x bar. When do we NOT need the Central Limit Theorem?
      When the standard deviation is known.
      When the sample size is large.
      When the parent population is normally distributed.

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