Corn was grown in two different kinds of soils A and B. The heights of the stalkswere measured.A sample of 13 stalks from soil A gave a mean height of 6.3 ft and a standarddeviation of 1.2 ft.A sample of 16 stalks from soil B gave a mean height of 6.5 ft and a standarddeviation of 1.1 ft.Assume the heights are normally distributed. To be specific, assume the heightsof stalks from soil A has the distribution N(μÃ, 02), and the heights of stalks fromsoil B has the distribution N(µB, 02²/3).B(a) Find a 98% confidence interval for the parameter σA.(b) Test HoA = σB against H₁ : σA ‡ σв at significance level a =ΤΑis your conclusion?= 0.10. What(c) Test Ho A = μB against H₁ μA ‡µB at significance level a =:is your conclusion?0.02. What

Soil A: Sample size nA=13 Sample mean x¯A=6.3 Sample standard deviation sA=1.2 Soil B: Sample size…

Answered: Corn was grown in two different kinds…

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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To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 42 feet. Assume the population standard deviation is 4.7 feet. The mean braking distance for Make B is 45 feet. Assume the population standard deviation is 4.4 feet. At a = 0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) rari rz (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are (Round to three decimal places as needed. Use a comma to separate answers as needed.)
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