Concept explainers
To find: The mean, variance and standard deviation of the data using graphing utility and the percent of data lie within one standard deviation of the mean.
Answer to Problem 32E
Mean = 753.7917
Variance = 227009.7
Standard Deviation = 476.4554
The percent of data lie within one standard deviation of the mean is 75%.
Explanation of Solution
Given information: Average prices of gold (in dollars per ounce) for the years 1994 through 2017.
Formula used: Mean (
Standard deviation (
Graph:
Interpretation:
Mean = 753.7917
Variance = 227009.7
Standard Deviation = 476.4554
The interval that contain all numbers that lie within one standard deviation of the mean is
From the given data, 18 numbers lie in this interval.
Thus, the percent of data lie within one standard deviation of the mean is 75%.
Chapter B Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning