# Statistics & Research Methods-ANOVA or F Test (CBSE-NET (UGC) Psychology (Paper-II & Paper-III)): Questions 6 - 9 of 9

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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 number: 6 (4 of 4 Based on Passage) Show Passage

» Statistics & Research Methods » ANOVA or F Test

Appeared in Year: 2014

### Question

What would be the degrees of freedom for error variance?

(June)

### Choices

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

a. | 90 | |

b. | 89 | |

c. | 84 | |

d. | 83 |

## Question number: 7

» Statistics & Research Methods » ANOVA or F Test

Appeared in Year: 2015

### Question

In a study, twenty – five subjects performed the same task under three conditions – relaxed, moderately stressed, and highly stressed. The suitable analysis of variance was carried out. The degree of freedom for the conditions X subjects interaction (used as an estimate of error variance) would be: (June)

### Choices

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

a. | 48 | |

b. | 24 | |

c. | 72 | |

d. | 74 |

## Question number: 8

» Statistics & Research Methods » ANOVA or F Test

Appeared in Year: 2015

### Question

Which one of the following is considered as a non-parametric alternative to one-way ANOVA for independent samples? (December)

### Choices

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

a. | Kruskal - Wallis H test | |

b. | Mann- Whitney U test | |

c. | Kolmogorov - Smirnov test | |

d. | Friedman’s ANOVA |

## Passage

Experimental personality research was extremely popular after 1950 for about three to four decades. In experimental personality research, one of the major focuses is to study how the effect of experimentally manipulated independent variable is moderated by personality variable/s. In one of such study, the researcher wanted to study whether the effect of interpolated learning (A) is moderated by Anxiety (B). The researcher hypothesized that the interpolated learning would adversely affect the recall of original learning, more in high anxious subjects than low anxious subjects. Using a standardized Anxiety scale, from an initial pool of two hundred subjects, fifty high and fifty low anxious subjects were obtained.

Both, high as well as low anxious groups were further divided into two groups-Experimental group and Control group. The experimental groups first learned List A of CVC trigrams then learned another List B of CVC trigrams with similar association values, and then tested for Recall (A). The subjects in control groups learned List A. then they received the cancellation task for the specific period (equal to the average time, taken by the corresponding experimental group to learn List B). The subjects were then tested for the Recall of (A). GroupWise means and standard deviations for recall scores were obtained.

The standard deviations were found comparable across the groups. Treating recall

Scores as the dependent variable, the appropriate ANOVA was carried out. The main effect of A was found significant at 0.05 levels. Similarly, the F-ratio, defined as was found statistically significant at 0.01 level.

## Question number: 9 (1 of 1 Based on Passage) Show Passage

» Statistics & Research Methods » ANOVA or F Test

Appeared in Year: 2015

### Question

What would be the degrees of freedom for the numerator and denominator of the F-ratio defined as ? (December)

### Choices

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

a. | 1 and 98 respectively | |

b. | 2 and 97 respectively | |

c. | 3 and 96 respectively | |

d. | 1 and 96 respectively |