Final answer:
To calculate a 95% confidence interval for the opening weekend revenue for movies in 2005, use StatCrunch instructions. Interpret the results as being 95% confident that the true revenue falls within the interval. Do the same for the total U.S. revenue in the dataset.
Step-by-step explanation:
To calculate a 95% confidence interval for the opening weekend revenue for movies in 2005, you can use StatCrunch following the given instructions. First, import the Excel data set into StatCrunch. Then, go to Stat > T-Stats > With Data. Select the variable representing the opening weekend revenue and choose the desired confidence level (95%). The output will provide you with the lower and upper bounds of the confidence interval.
To interpret the results, you can confidently state that you are 95% confident that the true opening weekend revenue for movies in 2005 falls within the calculated confidence interval. This means that if you were to repeatedly sample from the population of movies in 2005 and calculate confidence intervals in the same way, approximately 95% of those intervals would contain the true opening weekend revenue.
To calculate a 95% confidence interval for the total U.S. revenue for movies in the dataset, follow the same steps as before but select the variable representing the total U.S. revenue. Interpret the results in the same manner, stating that you are 95% confident that the true total U.S. revenue for movies in the dataset falls within the calculated confidence interval.