A developmental psychologist is examining problem solving ability for grade school children. Random samples of 5-year-old, 6-year-old, and 7-year-old children are obtained. Each child is given a standardized problem-solving task, and the psychologist records the number of errors. Test whether there are any significant differences among the three age groups; use the .05 level of significance.

The data are as follows:

5-year-olds: 5, 4, 6

6-year-olds: 6, 4, 2

7-year-olds: 0, 1, 2

a) create a JASP data file

b) Use JASP to do a one-way ANOVA

c) if F-value is significant, add the protected t-tests to the JASP analysis

d) Answer the following:

Null hypothesis:

A.

There are differences in problem-solving betweeen 5, 6, and 7-year old kids.

B.

There are no differences in problem-solving between 5, 6, and 7-year old kids.

The F-value is

F(____, _______)= _____, p = .031

True or false: There are significant differences between the age groups of children.

True

False

The protected t-tests showed one signifcant difference. Which one?

A.

5 year olds differed from 7 year olds

B.

6 year olds differed from 7 year olds

C.

5 year olds differed from 6 year olds

What is the interpretation of the significant finding:

A.

5 year olds made more errors than 7 year olds

B.

5 year olds made fewer errors than 7 year olds

C.

5 year olds made more errors than 6 year olds

D.

6 year old made more errors than 7 year olds