A researcher randomly assigns participants to watch one of three kinds of films one that tends to
Question:
A researcher randomly assigns participants to watch one of three kinds of films one that tends to make people sad, one that tends to make people angry, and one that tends to make people exuberant. The participants are then asked to rate a series of photos of individuals on how honest they appear, with the accompanying results.
Sad | Angry | Exuberant |
200 136 837
523 340 910
613 300 1007
(a) Carry out an analysis of variance using the actual scores(use
p<0.01).
There are three populations. Population 1 is people that watch the sadness movie. Population 2 is people that watch the anger movie. Population 3 is people that watch the exuberance movie. Determine the null and research hypotheses.
The null hypothesis is that
these three populations have the same mean honesty rating.
The research hypothesis is that
the populations' mean honesty ratings are not the same.
Part 2
Determine the characteristics of the comparison distribution.
The comparison distribution is an F distribution with
2 numerator and 6 denominator degrees of freedom.
Part 3
Determine the cutoff sample score on the comparison distribution at which the null hypothesis should be rejected.
The cutoff F ratio is 10.93
(Round to two decimal places asneeded.)
Part 4
Determine thesample's score on the comparison distribution.
The F ratio for this sample is
.
(Round to three decimal places asneeded.)
(b) Carry out asquare-root transformation of the scores.
A data transformation is a mathematical procedure used on each score in a sample. Asquare-root transformation is a data transformation using the square root of each score.
(c) Carry out an analysis of variance using the transformed scores(use
p<0.01).
Statistics For Psychology
ISBN: 9780205258154
6th Edition
Authors: Arthur Aron, Elaine N. Aron, Elliot J. Coups