Let's consider a 98% confidence interval of the average number of minutes someone finishes a race. The interval is 55 to 65 in a sample of 500 runners. Given what you learned in this chapter, how would this be strictly interpreted? 98% of the sample of runners finished between 55 and 65 minutes. If the sampling procedure were repeated many times, 98% of the sample means would be between 55 and 65. 2% of the sample of runners finished between 55 and 65 minutes. If the sampling procedure were repeated many times, 98% of the resulting confidence intervals would contain the population mean resting heart rate.

Answered: Let's consider a 98% confidence…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Let's consider a 98% confidence interval of the average number of minutes someone finishes a race. The interval is 55 to 65 in a sample of 500 runners. Given what you learned in this chapter, how would this be strictly interpreted?

		98% of the sample of runners finished between 55 and 65 minutes.
		If the sampling procedure were repeated many times, 98% of the sample means would be between 55 and 65.
		2% of the sample of runners finished between 55 and 65 minutes.
		If the sampling procedure were repeated many times, 98% of the resulting confidence intervals would contain the population mean resting heart rate.

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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