Ch.9: Sampling Distributions: MeanWorksheetSee all chapters
 Ch.1: Displaying Numeric Data 1hr & 19mins 0% complete Worksheet Ch.2: Measures of Center and Spread 2hrs & 18mins 0% complete Worksheet Ch.3: Probability and Rules 1hr & 44mins 0% complete Worksheet Ch.4: The Discrete Random Variable 53mins 0% complete Worksheet Ch.5: The Binomial Random Variable 1hr & 38mins 0% complete Worksheet Ch.6: Types of Continuous Random Variable Distributions 1hr & 35mins 0% complete Worksheet Ch.7: The Standard Normal Distribution (Z-Scores) 1hr & 22mins 0% complete Worksheet Ch.8: Using The Z-Score 1hr & 24mins 0% complete Worksheet Ch.9: Sampling Distributions: Mean 1hr & 22mins 0% complete Worksheet Ch.10: Sampling Distributions: Proportion 1hr & 31mins 0% complete Worksheet Ch.11: Hypothesis Testing: Part 1 1hr & 42mins 0% complete Worksheet Ch.12: Hypothesis Testing: Part 2 1hr & 43mins 0% complete Worksheet

Large Sample Confidence Interval for a Population Mean

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Concept #1: Determining the Large Sample Confidence Interval for a Population Mean

Concept #2: Determining the Large Sample Confidence Interval for a Population Mean: Intro

Practice: Gas prices are getting more and more expensive. The average gas price, from a random sample of 100 gas stations, was \$3.50. It is assumed that gas prices have a standard deviation of \$0.04. Construct an 80% confidence interval for the true mean gas price in the United States.

Practice: You want to take a trip to Paris. You randomly select 225 flights to Europe and find a mean and standard deviation of \$1500 and \$900, respectively. Construct a 95% confidence interval for the average price for a trip to Paris.

Practice: You want to purchase one of the new Altimas. You randomly select 400 dealerships across the United States and find an average and standard deviation of \$25,000 and \$2500. Construct a 94% confidence interval for the true average price for the new Nissan Altima.