# Statistics: Question Preview (ID: 22748)

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If a study is subject blind then... |
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a) the person giving the treatment does not know which treatment they are giving | b) The person receiving the treatment does not know which treatment he/she is getting | c) both giver and receiver do not know which treatment they are getting | d) | |

If a data set is approximately normal with a mean of 67 and a sigma value of 7, will data be spread out? |
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a) yes, because the sigma value is a big number | b) yes, because it approximately normal | c) no, because the data is normal anyway | d) no, because the sigma value is less than 10. | |

Jackie is within 2 standard deviations of the mean. How much data is left in the data? |
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a) 10% | b) 2.5% | c) 5% | d) 12% | |

What is the genreal rule for data that is approximately normal? |
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a) 66-95-99.7 | b) 68-95-99.9 | c) 66-95-99.9 | d) 68-95-99.7 | |

What is standard deviation? |
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a) A measure of how spread out the data is | b) a measure of the mean | c) the same thing as normal distribution | d) not important | |

Your height is 54 inches, and the mean is 58 inches with a standard deviation of 1.2. Your friends height is 60 inches. Who is relatively farther from the mean? |
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a) You | b) Your friend | c) | d) | |

If your height is 54 inches, and the mean is 58 inches with a standard deviation of 1.2, in which standard deviation category do you fall? |
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a) between 1 standard deviation | b) between 2 standard deviations | c) between 3 standard deviations | d) above 3 standard deviations | |

What is a lurking variable? |
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a) an association used to debunk your experiment | b) something required in any study or experiment | c) None of these | d) | |

Suppose that SAT mat scores for a year are approx. normal. With a mean of 510 and a sigma of 100. What is the probability that randomly selected score is greater than 710? |
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a) .05 | b) .10 | c) .025 | d) .01 | |

Suppose that SAT mat scores for a year are approx. normal. With a mean of 510 and a sigma of 100. What is the probability a random score selected is greater than 610? |
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a) 0.16 | b) 0.5 | c) .68 | d) .34 | |

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