3. In a plant nursery, the owner thinks that the lengths of seedlings in a box sprayedwith a new kind of fertilizer has an average height of 26 cm after three days anda standard deviation of 10 cm. One researcher randomly selected 80 suchseedlings and calculated the mean height to be 20 cm and the standard deviationwas 10 cm. Will you conduct a one-tailed test or two-tailed test? Proceed withthe test using a = 0.05.

Given: n=80x¯=20μ0=26σ=10α=0.05

Answered: In a plant nursery, the owner thinks…

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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Dr. Shoals predicts that people who walk a mile in moderately high heels will have less back pain than when they walk in very high heels. 27 participants walk in 4-inch heels and then 2.5-inch heels. He calculates the standard deviation of the difference scores and finds sD = 3.37. The mean back pain when walking in 4-inch heels is 6.75, and when walking in 2.5-inch heels, it is 3.25. What is the t statistic for this experiment
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