Calculate a 95 % confidence interval estimate for the population proportion of adults who turn off lights to conserve energy.
Calculate a 95 % confidence interval estimate for the population proportion of adults who turn off lights to conserve energy.
Solution Summary: The author calculates a 95% confidence interval estimate for the population proportion of adults who turn off lights to conserve energy.
Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.
Chapter 8, Problem 55PS
a.
To determine
Calculate a 95% confidence interval estimate for the population proportion of adults who turn off lights to conserve energy.
To determine
Calculate a 95% confidence interval estimate for the population proportion of adults who turn down heat to conserve energy.
To determine
Calculate a 95% confidence interval estimate for the population proportion of adults who install more energy-saving appliances to conserve energy.
To determine
Calculate a 95% confidence interval estimate for the population proportion of adults who drive less, walk more or bicycle more to conserve energy.
To determine
Calculate a 95% confidence interval estimate for the population proportion of adults who unplug things to conserve energy.
b.
To determine
Conclude about the methods that adults do to conserve energy.
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