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Question 2 Login and open StatCrunch ( directions ). Open your IAT sample data set in StatCrunch ( directions ) We will use a 90%
Question 2
Login and open StatCrunch (directions).
Open your IAT sample data set in StatCrunch (directions)
We will use a 90% confidence interval to estimate the population proportion of participants born-female in our chosen IAT data set.
- So, you are tasked with using your IAT sample to calculate a 90% confidence interval that estimates the population proportion of participants born-female in your particular IAT. But, you are missing a piece of information that would allow you to use your graphing calculator to find the confidence interval. What piece of information is missing?
- Even though we cannot readily use our graphing calculators, StatCrunch can calculate the confidence interval for us! Use StatCrunch to find the 90% confidence interval for the population proportion of female participants in your particular IAT (directions - opens in a new tab). Highlight and copy everything in your StatCrunch output window and paste it in your response.
- Identify the sample proportion (p^) in the StatCrunch output table. Then determine whether conditions are met for using the confidence interval to estimate the population proportion of female participants in your chosen IAT. Show your work.
- If conditions are met, estimate the population proportion of female participants in your particular IAT, and state your conclusion in context. If conditions are not met, explain what a researcher could do so that conditions are met.
- Based on your analysis, do you think the population of participants in your chosen IAT are representative of the U.S. population? Explain.
90% confidence interval results:
One sample proportion confidence interval: Outcomes in : Sample(Birth-Gender) Success : 2 p : Proportion of successes Method: Standard-Wald 90% confidence interval results:
Variable | Count | Total | Sample Prop. | Std. Err. | L. Limit | U. Limit |
---|---|---|---|---|---|---|
Sample(Birth-Gender) | 431 | 600 | 0.71833333 | 0.018363485 | 0.68812809 | 0.74853858 |
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