Determine the appropriate statistical technique with which to answer the researcher's questions. Then, determine if the result is significant using a two-tailed test with ? = .05 (i.e.., report both r/rho/U/T/x²/t_critical and r/rho/U/T/x²/t_observed).

Help me with all four steps please:

1) state the null and alternative hypotheses

2) identify the critical region

3) calculate the test statistic, a

4) make a formal decision about the null hypothesis and state your conclusion in the standard format for that test.

A psychologist is interested in examining the influence of having an older sibling on the development of social skills. A sample of 24 three-year old children is obtained; one group of 12 has at least one older sibling who is within 5 years of age, and one group of 12 has no siblings. The psychologist records a social skills core for each child. To save you time, I've given you the data that is needed to solve the problem. Does this data suggest an influence of having a sibling on socialization?

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