From a sample with n= 36, the mean duration of a geyser's eruptions is 3.48 minutesand the standard deviation is 0.89 minutes. Using Chebychev's Theorem, determine atleast how many of the eruptions lasted between 0.81 and 6.15 minutes.At least of the eruptions lasted between 0.81 and 6.15 minutes.(Simplify your answer.)>a#Time Remaining: 01:05:58%>Nextr3839404142434445353637343332293031282726252411617181920212223Aver

Given information- Sample size (n) = 36 Mean x̅ = 3.48 minutes Standard deviation (s) = 0.89 minutes…

Answered: From a sample with n= 36, the mean…

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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Researchers at the National Weather Center in Portland, Maine recorded the number of 90° days each year since records were first kept, starting in 1875. The number of 90° days form a normal-shaped distribution, with a mean of μ = 9.6 days and a standard deviation of σ = 1.9. To see if the data showed any evidence of climate change (and specifically global warming), they also computed the mean number of 90° days for the most recent n = 4 years and obtained a mean number of days for the past four years of x̅ = 12.25 days. Using a one-tailed test with α = .05, the researchers completed the calculations, but they need your help in drawing an appropriate conclusion. (According to their calculations, the standard error is sM = 0.95, and the sample mean of x̅ = 12.25 days corresponds to a z-score of z = 2.79.) Using the same one-tailed test (α = .05), determine if the data indicate that the past four years have had significantly more 90° days than would be expected for a random sample from…
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