Suppose a geyser has a mean time between eruptions of 69 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 27 minutes. (e) What might you conclude if a random sample of 26 time intervals between eruptions has a mean longer than 81 minutes? Select all that apply.O A. The population mean must be less than 69, since the probability is so low.B. The population mean cannot be 69, since the probability is so low.C. The population mean is 69, and this is an example of a typical sampling result.D. The population mean is 69, and this is just a rare sampling.] E. The population mean may be greater than 69.] F. The population mean may be less than 69.O G. The population mean must be more than 69, since the probability is so low. Suppose a geyser has a mean time between eruptions of 69 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 27 minutes. Completeparts (a) through (e) below.(a) What is the probability that a randomly selected time interval between eruptions is longer than 81 minutes?The probability that a randomly selected time interval is longer than 81 minutes is approximately(Round to four decimal places as needed.)(b) What is the probability that a random sample of 12 time intervals between eruptions has a mean longer than 81 minutes?The probability that the mean of a random sample of 12 time intervals is more than 81 minutes is approximately(Round to four decimal places as needed.)(c) What is the probability that a random sample of 26 time intervals between eruptions has a mean longer than 81 minutes?The probability that the mean of a random sample of 26 time intervals is more than 81 minutes is approximately(Round to four decimal places as needed.)(d) What effect does increasing the sample size have on the probability? Provide an explanation for this result. Fill in the blanks below.If the population mean is less than 81 minutes, then the probability that the sample mean of the time between eruptions is greater than 81 minutesV because the variability inthe sample meanas the sample size

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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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Suppose a geyser has a mean time between eruptions of 69 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 27 minutes.

(e) What might you conclude if a random sample of 26 time intervals between eruptions has a mean longer than 81 minutes? Select all that apply.
O A. The population mean must be less than 69, since the probability is so low.
B. The population mean cannot be 69, since the probability is so low.
C. The population mean is 69, and this is an example of a typical sampling result.
D. The population mean is 69, and this is just a rare sampling.
] E. The population mean may be greater than 69.
] F. The population mean may be less than 69.
O G. The population mean must be more than 69, since the probability is so low.

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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