Estimating a population mean lab

Prompt

You are tasked with using StatCrunch and your unique IAT sample to estimate the population mean for your IAT-Score variable.

Question 1

1. Use StatCrunch and your unique IAT sample to estimate the mean IAT-Score for the population of IAT participants at the 80% confidence level (directions). Copy the contents of your StatCrunch output window and paste it into your response.
2. Identify the 80% confidence interval.
3. Interpret your confidence interval in context.
4. Can we use the StatCrunch output to find the margin of error (MOE)? If so, what is the MOE? If not, identify the missing information.

Question 2

1. Use StatCrunch and your unique IAT sample to estimate the mean IAT-Score for the population of IAT participants at the 95% confidence level (directions). Copy the contents of your StatCrunch output window and paste it into your response.
2. Identify the 95% confidence interval.
3. Interpret your confidence interval in context.
4. Can we use the StatCrunch output to find the margin of error (MOE)? If so, what is the MOE? If not, identify the missing information.

Question 3

1. Which of the two confidence intervals is more accurate? Briefly explain.
2. Which of the two confidence intervals is more precise? Briefly explain.