A researcher is asked to test the claim that the average wind speed at Calgary InternationalAirport last year was greater than 25 km/h. A random sample of 16 days is drawn from therecords. On these 16 days, the average wind speed was 28 km/h with a standard deviationof 12 km/h. Use an alpha value of .05.1.Họ:(expressed symbolically)(in words)_H1:(expressed symbolically)_(in words).a =Test Statistic:Conclusion:

Solution:- Given : μ0=25,x¯=28,n=12,s=16,α=0.05 We find, Hypothesis Test statistic Conclusion

Answered: A researcher is asked to test the claim…

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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Identify the notation for each given number. For a random sample of 550 randomly selected car batteries, it was found that their output had a mean of 12.5 volts and a standard deviation of 1.2 volts. V = 550 car batteries V = 12.5 volts V = 1.2 volts
A 1995 study shows that since records were first kept in a meteorologist's hometown, the average temperature during the month of May was u=68 degrees. The meteorologist then looks up the average temperatures for each of the 25 Mays since then, and finds their sample mean to be x= 73 and their standard deviation to be s= 8.55 degrees. Can the meteorologist claim that the average temperatures for May is different from how it used to be? Use a 1% level of significance. What is the null hypothesis and the alternate hypothesis? Is the test is left tailed, right tailed, or two tailed? What is the P value? What is the comparison between the P-value and the a-value given? Do we reject or accept the null hypothesis?
Use z scores to compare the given values. The tallest living man at one time had a height of 225 cm. The shortest living man at that time had a height of 104.3 cm. Heights of men at that time had a mean of 173.55 cm and a standard deviation of 5.15 cm. Which of these two men had the height that was more extreme? Since the z score for the tallest man is z= and the z score for the shortest man is z= the V man had the height that was more extreme. (Round to two decimal places.)
Use z scores to compare the given values. The tallest living man at one time had a height of 238 cm. The shortest living man at that time had a height of 142.4 cm. Heights of men at that time had a mean of 175.45 cm and a standard deviation of 5.59 cm. Which of these two men had the height that was more extreme? ... Since the z score for the tallest man is z = 0 and the z score for the shortest man is z = the man had the height that was Im- more extreme. (Round to two decimal places.) shortest tallest
The mean time taken by all participants to run a road race was found to be 110 minutes with a standard deviation of 15 minutes. Using Chebyshev's theorem, find the percentage of runners who ran this road race in 80 to 140 minutes. Round your answer to the nearest integer. of
The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are Using the table I provided anwser the following questions A. Find the mean of battery lives __hrs B. Find the standard deviation of the battery lives
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There are frogs and koi in a pond, and the number of frogs and the number of koi in the pond are independent. Let X represent the number of frogs in any given week, and let Y represent the number of koi in any given week. X has a mean of 28 with a standard deviation of 2.7, and Y has a mean of 15 with a standard deviation of 1.6. Which answer choice correctly calculates and interprets the standard deviation of the difference, D = X - Y? = 1.05; this pond can expect the difference of frogs and koi to vary by approximately 1.05 from the mean. = 1.1; this pond can expect the difference of frogs and koi to vary by approximately 1.1 from the mean. = 3.1; this pond can expect the difference of frogs and koi to vary by approximately 3.1 from the mean. = 13; this pond can expect the difference of frogs and koi to vary by approximately 1.05 from the mean.
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