Exercise 1 Is there a linear relationship between the age at which a child first begins...
|
Exercise 1 |
Is there a linear relationship between the age at which a child first begins to speak and the child’s later mental ability? A study was conducted in which the age (in months) at which a child spoke their first words and the score on an aptitude test as a teenager were recorded:
|
Age |
15 |
26 |
10 |
9 |
15 |
20 |
18 |
11 |
8 |
20 |
|
Score |
95 |
71 |
83 |
91 |
102 |
87 |
93 |
100 |
104 |
94 |
- State the null and alternative hypotheses and the level of
significance you intend to use.
- Write the equation for the appropriate test statistic.
- What is your decision rule? Be sure to include the degrees of
freedom, if appropriate.
- Compute the test statistic by hand.
What is your conclusion about the null hypothesis and the research question? Be sure to comment on the magnitude and direction of the association.
Homework Answers
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Exercise 1
Is there a linear relationship between the age at which a child
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