21. Given: n =80, X = 76.5, s = 3.1. Which of these is the point estimate of thepopulation mean?a.80b. 76.5C. 8.9d. 3.1

Answered: Image /qna-images/answer/68d32364-889e-4375-b569-d7d093cc7d41.jpg

Answered: 21. Given: n = 80, X = 76.5, s = 3.1.…

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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21. Butterfly wings: Do larger butterflies live longer? The wingspan (in millimeters) and the lifespan in the adult state (in days) were measured for 22 species of butterfly. Following are the results. Vin 35.5 30.6 30.0 32.3 23.9 27.7 Wingspan Lifespan Wingspan Lifespan 19.8 17.3 27.5 22.4 40.7 18.3 25.9 23.1 24.0 38.8 36.5 Source: Oikos Journal of Eology 105:41--54 25.9 31.3 23.0 26.3 23.7 27.1 28.1 25.9 28.8 31.4 28.5 32.5 27.5 31.0 37.4 22.6 23.1 18.5 35.9 25,4 24.6 28.1 32.3 29.1 37.0 33.7 a. Compute the least-squares regression line for predicting lifespan (y) from wingspan (x). b. Construct a 99% confidence interval for the slope. c. Test H B =0 versus H 6 <0, Can you conclude that wingspan is useful in predicting lifespan? Use the a 0.05 level of significance. d. Do larger butterflies tend to live for a longer or shorter time than smaller butterflies! Explain,
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21. Given: n = 80, X = 76.5, s = 3.1. Which of these is the point estimate of the population mean? a. 80 b. 76.5 C. 8.9 d. 3.1