The table below shows the number of state-registeredautomatic weapons and the murder rate for severalNorthwestern states.XxYx = thousands of automatic weaponsy = murders per 100,000 residents.11.5 8.27.1 3.9 2.6 2.4 2.50.613.5 11.2 10.1 7.6 6.1 6.4 6.3 4.8This data can be modeled by the equation y = 0.81x + 4.3.Use this equation to answer the following;Special Note: I suggest you verify this equation by performinglinear regression on your calculator.A) How many murders per 100,000 residents can be expectedin a state with 10.2 thousand automatic weapons?Answerdecimal places.=B) How many murders per 100,000 residents can be expectedin a state with 7.3 thousand automatic weapons?Answerdecimal places.=Round to 3Round to 3

Answered: Image /qna-images/answer/459f5723-f18c-4461-ba92-8380d4545ecb.jpg

Answered: The table below shows the number of…

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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A food bank investigates if the number of times their donors walk by a homeless person each week impacts donors’ charitable contribution to the food bank. The data are presented below in standard form. # of homeless people seen each week Donation to food bank Donor ZX ZY 1 -1.3 0.36 2 0.64 -0.09 3 -1.1 1.26 4 -0.14 0.14 5 1.41 -0.54 6 -0.52 -0.09 7 1.03 -1.9 8 0.64 -0.99 9 0.83 0.36 10 -1.49 1.49 What does ΣZXZY equal? A) 941B) 7.86C) -7.16D) -4.44 What is the correlation (Pearson’s r) between the number of homeless people donors see each week and their donation to the food bank (rounded to 2 decimal places)? A) .98B) -.80C) .72D) -.56 What is the obtained t-value for this r? A) -2.96B) -16.35C) -3.72D) -1.89 What are the degrees of freedom? A) 4B) 20C) 8D) 10 What is the critical t-value? A) 3.68B) 2.31C) 2.01D) 3.30 What is your conclusion? A) There is…
The table below shows the number of state-registered automatic weapons and the murder rate for several Northwestern states. 11.8 8.5 7 3.3 2.5 2.8 2.2 0.6 14.2 11.6 10.3 7.1 6.4 6.7 6.2 4.8 thousands of automatic weapons = murders per 100,000 residents This data can be modeled by the linear equation ŷ = 0.84x + 4.33 a. How many murders per 100,000 residents can be expected in a state with 9.1 thousand automatic weapons? Round to 3 decimal places. murders per 100,000 residents b. How many murders per 100,000 residents can be expected in a state with 4.3 thousand automatic weapons? Round to 3 decimal places. murders per 100,000 residents
2. The table below shows the prevalence of smoking among U.S. adults. a. Make a scatter plot for the data for males and females. b. Write a brief summary to accompany the graph. Smoking Prevalence Among U.S. Adults, 1965–2009 (as a percent of population, 18 years of age and older) Overall Year population Males Females 1965 41.9% 51.2% 33.7% 1974 37.0 42.8 32.2 1983 31.9 34.8 29.4 1985 29.9 32.2 27.9 1990 25.3 28.0 22.9 1992 26.3 28.1 24.6 1994 25.3 27.6 23.1 1995 24.6 26.5 22.7 1997 24.6 27.1 22.2 25.9 25.2 1998 24.0 22.1 1999 23.3 21.6 2000 23.1 25.2 23.4 21.1 2005 2007 20.8 18.3 19.7 22.0 17.5 2009 20.6 23.4 18.3 Source: Statistical Abstracts of the United States, 2012, www.census.gov/ compendia/statab.
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Statistical technique used to determine the degree to which two variables are related is known as a. Regression b. Correlation c. None of these d. Dispersion
The table below shows the number of state-registered automatic weapons and the murder rate for several Northwestern states. X Y 11.4 8.4 6.6 13.7 11 9.3 X = thousands of automatic weapons y = murders per 100,000 residents 3.7 7.5 This data can be modeled by the equation y = Answer = 2.4 2.6 2.4 0.4 6.3 5.9 6.2 4.1 to answer the following; Special Note: I suggest you verify this equation by performing linear regression on your calculator. Answer = 0.84x +4.01. Use this equation A) How many murders per 100,000 residents can be expected in a state with 6.2 thousand automatic weapons? Round to 3 decimal places. B) How many murders per 100,000 residents can be expected in a state with 6.9 thousand automatic weapons? Round to 3 decimal places.
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