# Measurement and Methodology-Statistical Procedures [GRE (Graduate Record Examinations) Psychology]: Questions 14 - 16 of 27

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## Question 14

Statistical Procedures

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### Question

MCQ▾Which of the following is NOT true of the Chi Square statistic?

### Choices

Choice (5) | Response | |
---|---|---|

a. | It makes no assumptions about population parameters. | |

b. | It does not assume that the variance between two groups is equal. | |

c. | It should be used with nominal data. | |

d. | It is based on expected frequencies. | |

e. | It is a parametric test. |

## Question 15

Statistical Procedures

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### Question

MCQ▾The members of a sample who deviate from the mean by a standard deviation expressed as a Z-score of 3 represent

### Choices

Choice (5) | Response | |
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a. | outliers | |

b. | the most frequent two-thirds of the sample | |

c. | members of the sample who are most likely to appear three times more frequently than other members of the sample | |

d. | members of the sample who are most likely to appear six times more frequently than other members of the sample | |

e. | the most frequent third of the sample |

## Question 16

Statistical Procedures

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### Question

MCQ▾A normal distribution of 2000 scores has a mean of 150 and a standard deviation of 6. Jenny received a 162. Each of the following is true of her score EXCEPT

### Choices

Choice (5) | Response | |
---|---|---|

a. | approximately 68 % of student scored lower than she did | |

b. | approximately 48 % of the total scores lie between her score and the mean | |

c. | her score is equivalent to a z-score of + 2 | |

d. | her score is two standard deviations from the mean | |

e. | her percentile rank is approximately the 98^{th} percentile |