Quiz
Chapter 11
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Questions in this quiz (7)
1Two of the following statements describe a correct probability model. Which statement does not?
- AThere is a probability assigned to each event.
- BThe sum of all the probabilities is equal to one.
- CAll of the probabilities are between negative one and one.
2Which of the following random variables is continuous?
- ATime required to run a mile
- BNumber of children in a family
- CNumber of books on a shelf
3True or False: The distribution of a random variable shows all possible values the random variable could take and how often they occur
- ATrue
- BFalse
4Which one of the following random variables is discrete?
- AHeight of an adult male
- BGPA
- Cnumber of phone calls received in a day
5Students at a particular university are able to evaluate professors on a five point scale (a score of 1 meaning poor teaching and a score of 5 meaning excellent teaching, with answers limited to whole numbers). What type of random variable is professor evaluation an example of?
- Adiscrete
- Bcontinuous
- Cit is impossible to say given the information provided
6What does the distribution of a random variable give us?
- AThe measure of the amount of deviation of the random variable about the mean.
- BA density curve whose x values are always positive.
- CAll possible values of the random variable and how often they occur.
7What is a correct description of the median of a distribution that is described by a density curve?
- AThe value in the data set that occurs with the highest frequency.
- BThe point that is intermediate between interquartile range and standard deviation.
- CThe value that divides the area of the density curve in half.
- DThe point at which the distribution "balances".
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- Statistics Quiz on Chapter 11, created by sarah wood on 11/02/2019.
- Author
- sarah wood
- Language
- English
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