In a country with a population of 20 million people, 175,000 deaths occurred during the year endingDecember 31, 2021. These included 45,000 deaths from COVID in 135,000 persons who were sickwith COVID. Assume that the population remained constant throughout the year.What is the cause-specific mortality of COVID in this country?a. 175,000/20 millionb. 135,000/175,000c. 45,000/135,000d. 45,000/175,000e. 45,000/20 million

The question is about demography Given : No. of deaths due to "CO." = 45000 Total no. of population…

Answered: a popu people, during the year ending…

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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Consider the following scenario and answer the questions below: The ornithologist decided to investigate the effect of temperature on the migration of North American birds. Develop a hypothesis in the appropriate format. Identify the independent variable. Identify the dependent variable. Plan an investigation (what would she do to collect data?). Did she engage in basic science or applied science? Explain. Did she engage in inductive or deductive reasoning? Explain
question 8
Question 2 Ten countries were randomly selected from the list of 129 countries in the Country. The countries are compared with respect to their gross national product per capita, an indicator of the average income level of each country. Researchers have found that people in countries with higher income levels tend to live longer than do people in countries with lower income levels. In addition, birth rates tend to be higher in countries with lower incomes, with birth rates declining as countries become better off economically. a. Use this data to determine the Spearman rank correlation of GNP with (i) life expectation, and (ii) the birth rate. b. Test to determine whether the correlation of ranks is statistically significant at the 0.05 level of significance. Country GNP Life Crude Expectation Birth Rate Algeria 2360 65 34 India 340 59 31 780 Mongolia El Salvador Ecuador Malaysia Ireland 62 36 940 64 1120 66 32 1940 74 32 7750 74 18 Argentina France 2520 71 21 16090 76 14 Sierra Leone…
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1) You test a new drug to reduce blood pressure. A group of 15 patients with high blood pressure report the following systolic pressures (measured in mm Hg): before medication: after medication: change: ̄y s187 120 151 143 160 168 181 197 133 128 130 195 130 147 193 157.53 27.409 187 118 147 145 158 166 177 196 134 124 133 196 130 146 189 156.40 27.060 0 2 4 -2 2 2 4 1 -1 4 -3 -1 0 1 4 1.133 2.295 a) Calculate a 95% CI for the change in blood pressure. b) Calculate a 99% CI for the change in blood pressure. c) Does either interval (the one you calculated in (a) or (b)) include 0? Why is this important? d) Now conduct a one sample t-test using μ = 0, and α = .05. Are the results consistent with (a)? Why or why not? e) Finally, conduct a one sample t-test using μ = 0, and α = .01. Are the results consistent with (b)? Why or why not?
QUESTION 4 The Global Business Travel Association (GBTA) reported the domestic airfare for business travel for the current year and the previous year. Below is a sample of 6 flights with their domestic airfares (in $) shown for both years. Suppose GBTA wished to see if the average airfare for the current year is greater than the average airfare for the previous year at a=.1. Current 355 743 560 449 263 651 Previous 348 746 549 440 250 652 For the hypothesis stated above, what is the critical value (in terms of "Current" minus "Previous")? O a. 1.476 O b. 1.440 O C. 1.383 O d. None of the answers is correct O e. 1.372 QUESTION 5 Sav Click Save and Submit to save and submit. Click Save All Answers to save all answers. MacBook Pro
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3
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1. If alpha is changed from .05 to .01, it is easier or harder to make a Type 1 error? 2.If alpha is changed from .05 to .01, it is easier or harder to make a Type 2 error? 3.If alpha is changed from .01 to .05, it is easier or harder to make a Type 2 error? 4.If alpha is changed from .01 to .05, it is easier or harder to make a Type 1 error?
Iim. 12

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