Answered: 1. A realtor wishes to know what…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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1. A realtor wishes to know what proportion of household occupants in the region own their home (as opposed to rent) within 0.06 at the 20% level of significance. How big a sample must be collected, if the true proportion is known to be at least 0.68?

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A sports reporter wishes to establish the mean satisfaction level (on a scale from 0 to 10) to within a margin of error of 0.6. If it is known from previous studies that the standard deviation in the level of fan satisfaction is 3.1, what sample size will be needed to achieve the desired precision with 98% confidence?

Standard Normal Distribution Table

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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.

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