Having trouble finding the correct mean and deviation, thank you. Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum toincrease funding for education is on the ballot in a large town (voting population over 100,000). An exit poll of 400 voters finds that208 voted for the referendum. How likely are the results of your sample if the population proportion of voters in the town in favor of thereferendum is 0.48? Based on your result, comment on the dangers of using exit polling to call elections.How likely are the results of your sample if the population proportion of voters in the town in favor of the referendum is 0.48?The probability that more than 208 people voted for the referendum is(Round to four decimal places as needed.)

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Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 1C

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Having trouble finding the correct mean and deviation, thank you.

Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum to
increase funding for education is on the ballot in a large town (voting population over 100,000). An exit poll of 400 voters finds that
208 voted for the referendum. How likely are the results of your sample if the population proportion of voters in the town in favor of the
referendum is 0.48? Based on your result, comment on the dangers of using exit polling to call elections.
How likely are the results of your sample if the population proportion of voters in the town in favor of the referendum is 0.48?
The probability that more than 208 people voted for the referendum is
(Round to four decimal places as needed.)

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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