# Measurement and Methodology (GRE Psychology): Questions 46 - 49 of 88

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## Question number: 46

» Measurement and Methodology » Statistical Procedures

### Question

Which of the following statistical tests should the researcher use to analyze her data?

A researcher wants to consider the effects of preparation on standardized test scores. She plans to compare the GRE scores of students who did and did not take a preparation course for the GRE. She also plans to compare the GRE scores of students who took preparation courses though Company X, Company Y, and Company Z.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 2 x 3 factor analysis | |

b. | 2 x 2 x 2 factor analysis | |

c. | T-test | |

d. | Chi-square test |

## Question number: 47

» Measurement and Methodology » Psychometrics, Test Construction, Reliability, Validity

### Question

A test that is valid must

### Choices

Choice (4) | Response | |
---|---|---|

a. | predict future behavior | |

b. | be reliable | |

c. | have scores that fit a normal curve | |

d. | be normed on a random sample |

## Question number: 48

» Measurement and Methodology » Statistical Procedures

### Question

Which of the following best describes the graph above?

### Choices

Choice (4) | Response | |
---|---|---|

a. | Frequency polygon | |

b. | Negatively skewed distribution | |

c. | Histogram | |

d. | Normal distribution |

## Question number: 49

» Measurement and Methodology » Psychometrics, Test Construction, Reliability, Validity

### Question

Coefficient alpha is conceptually

### Choices

Choice (4) | Response | |
---|---|---|

a. | estimate of inter-sorer reliability is most flexible | |

b. | the standard deviation of all possible sources of variation. | |

c. | the estimate of inter-scorer reliability that is most robust. | |

d. | the mean of all possible split-half correlations. |