A developmental psychologist would like to know whether there is a difference in sociability scores of children according the number of siblings they have. He chose three random samples of n = 5 children each according to three groups and measured their level of sociability using a standardized test. The scores are shown in the table below. Do the scores indicate significant differences among the three groups? A) Using the 5 steps of hypothesis testing, test at ? .05.
No sibling 4,5,7,3,4,
One sibling 7,7,6,6,7,
Two siblings 8,9,7,8,9,