On the basis of this sample, can the researcher conclude that vocabulary skills for children with no siblings are significantly different from those of the general population
A psychologist has developed a standardized test for measuring the vocabulary skills of 4-year-old children. The scores on the test form a
For each problem students will write out all steps of hypothesis testing:
- State the null and research hypotheses.
- Set the level of risk associated with the null hypothesis.
- Select the appropriate test statistic.
- Compute the test statistic value (called the obtained value).
- Determine the value needed for rejection of the null hypothesis using the appropriate table of critical values for the particular statistic.
- Compare the obtained value and the critical value.
- Make your decision.
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