# Research Methods and Statistics [GATE (Graduate Aptitude Test in Engineering) Psychology]: Questions 67 - 70 of 320

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### Passage

A researcher wanted to study the effect of a specific drug on the activity of rats. He suspected if the effect of the drug is moderated by temperature. He varied drug dosage (A) at three levels-no drug (placebo) , low drug dosage (5 mg/kg body-weight) and high drug dosage (10 mg/kg bodyweight) . He varied temperature (B) at two levels – 25 degree Celsius and 39 degree Celsius. Fifteen rats were randomly assigned to each of the six groups. The activity scores for each rate were obtained through activity wheel. The cell means and standard deviations for activity scores were obtained for the six cells. All the cells had comparable standard deviations. A suitable analysis of variance was carried out using the activity scores as the dependent variable. One of the interesting finding in this research was that the F ratio defined as ‘MSA B/MSE’ was statistically significant at . 01 level.

(June 2014)

## Question 67 (3 of 4 Based on Passage)

### Question

MCQ▾Since the F ratio, defined as ‘MSA B/MSE’ , is significant, it would be desirable to carry out

### Choices

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

a. | simple effects analysis | |

b. | compute 3 2 multivariate ANOVA | |

c. | post-hoc comparison for the two levels of B. | |

d. | post-hoc comparisons for the three levels of A |

## Question 68 (4 of 4 Based on Passage)

### Question

MCQ▾From the significant F ratio, ‘MSA B/MSE’ , it can be inferred that

### Choices

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

a. | the main effect of drug dosage is significant | |

b. | the main effect of temperature is significant | |

c. | the effect of drug dosage is moderated by temperature | |

d. | the main effect of drug dosage, the main effect of temperature, and the interaction effect of the two, all are significant. |

## Question 69

Appeared in Year: *2014 (UGC)*

### Question

MCQ▾On a Wechsler type intelligence scale Arish has a deviation IQ of 115. If the norms of this test are expressed in terms of normalized T scores (mean = 50, SD = 10) , what would be the T score of Arish? (December)

### Choices

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

a. | 65 | |

b. | 84 | |

c. | 60 | |

d. | 40 |

## Question 70

### Question

MCQ▾Test of ________ provide an estimate of how often experimental effects could have occurred by chance alone.

### Choices

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

a. | Statistical significance | |

b. | Significant difference | |

c. | Probability | |

d. | All of the above |