Homework SourseA school board member wants to determine how time of day and
A school board member wants to determine how time of day and location are related to verbal learning in preschoolers in his city. The board member selects a simple random sample of 40 children in a morning preschool on the city\'s east side. He also selects an independent simple random sample of 60 children in an afternoon preschool on the city\'s west side. He finds the results of verbal learning assessments for both groups. Of the following, which is the most important observation about the board member\'s plan?
The plan is well conceived and should serve the intended purpose.
His samples are too small.
He should have used equal sample sizes.
He will be unable to tell whether a difference in verbal learning assessment is related to differences in time of day or to differences in city location.
He should have randomly selected the two preschools instead of choosing them nonramdomly.
| The plan is well conceived and should serve the intended purpose. | ||
| His samples are too small. | ||
| He should have used equal sample sizes. | ||
| He will be unable to tell whether a difference in verbal learning assessment is related to differences in time of day or to differences in city location. | ||
| He should have randomly selected the two preschools instead of choosing them nonramdomly. |
Solution
He will be unable to tell whether a difference in verbal learning assessment is related to differences in time of day or to differences in city location.
