In a country the number of immigrated people and births is about the same as the number of deaths and emigrated people The country has achieved a positive population growth b zero population growth c...

Johns Hopkins University and Medicine collects and coronavirus data publishes them to their Coronavirus Resource Center The table shows the first few countries in alphabetical order along with several key variables lrrrrrr Country Confirmed Deaths Fatality Population r Deaths/ 100k Pop Algeria 8697 617 00709 42972878 144 Andorra 763 51 00668 77000 6623 Angola 70 4 00571 32522339 001 Antigua and Barbuda 25 3 01200 98179 306 Argentina 13228 484 00366 45479118 106 Confirmed represents the number of confirmed cases of COVID-19 Deaths is the number of deaths attributed to COVID-19 Case-fatality is the number of deaths divided by the number of confyrmed cases Population is the number of people in the country according to The World Factbook Deaths per 100k pop is the number of deaths attributed to COVID-19 per 100000 people in the country and is commonly called the death rate per hundred thousandThe histogram of case-fatalities is shown60

Question 18 (1 point) Listen Hawks do not like the noise that humans make so they tend to move out of an area as more and more people move into the area If p represents the number of thousands of people in an area and h represents the number of hawks in the same area the relationship between the hawk population and the human population can be modeled with the equation h(p)=1000- p2 Since hawks eat mice as the hawk population decreases the mice population in the area will increase If m represents the number of mice in the area this relationship can be modeled with the equation

Cigarette smoking and cancer have been linked Assume the number of bladder cancer deaths (in deaths/100 thousand) and cigarette sales (in cigarettes/person) for 40 randomly selected countries are in the table below X cigarette sales (in cigarettes/person)Y the number of bladder cancer deaths (in deaths/100 thousand) 2117404237539528924792013082582352200829427914751806325234429328645983364781822921162921842912692469225732121255142864462918499228647818242992756404291453259152128043226184092496527282744630343462378489311511215846516083062344286258946319962892332372404656221242314331a) State the random variables rv X = Select an answer a randomly selected country the mean cigarette sales the mean the number of bladder cancer deaths the cigarette sales the the number of bladder cancer deaths all countries of Select an answer all countries the the number of bladder cancer deaths the mean the number of bladder cancer deaths the mean cigarette sales the cigarette sales a randomly selected country rv Y = Select an answer the mean the number of bladder cancer deaths all countries the mean cigarette sales the the number of bladder cancer deaths the cigarette sales a randomly selected country of Select an answer the mean the number of bladder cancer deaths the the number of bladder cancer deaths the mean cigarette sales all countries the cigarette sales a randomly selected country b) Make a scatterplot of X versus Y in StatCrunch (optional) Why do we wish to sketch a scatterplot Select an answer There is no reason to sketch a scatterplot To verify that a linear model is appropriate and to look for outliers c) Find the equation of the best-fitting line (the least squares regression equation) Round values to 4 decimal places Include the restricted domain equation X Y Y n X p N sigma mu p s = + X restricted domain cigarettes/person lt= X lt= cigarettes/person d) Interpret the slope from part c in the context of this problem (Pay attention to the units) Every time we increase Select an answer all countries the mean cigarette sales the the number of bladder cancer deaths the mean the number of bladder cancer deaths a randomly selected country the cigarette sales by we can expect Select an answer a randomly selected country the cigarette sales the mean the number of bladder cancer deaths the mean cigarette sales the the number of bladder cancer deaths all countries to Select an answer decrease increase by on averagee) Interpret the Y-intercept from part c in the context of this problem Include units When Select an answer cigarette sales country the number of bladder cancer deaths countries is we expect Select an answer the cigarette sales the the number of bladder cancer deaths a randomly selected country the mean the number of bladder cancer deaths all countries the mean cigarette sales to be Does it make sense to interpret the Y-intercept on this problem Why or why not Select an answer yes since X = 0 is between Xmin and Xmax yes since X = 0 is not between Xmin and Xmax yes since Y = 0 is between Ymin and Ymax yes since Y = 0 is not between Ymin and Ymax no since X = 0 is between Xmin and Xmax no since X = 0 is not between Xmin and Xmax no since Y = 0 is between Ymin and Ymax no since Y = 0 is not between Ymin and Ymax f) Should you use the regression equation to predict the the number of bladder cancer deaths of a randomly selected country that has a cigarette sales of 16 cigarettes/person Select an answer no this X-value is not between Xmin and Xmax yes this X-value is between Xmin and Xmax yes you can use the regression equation for any value of X Should you use the regression equation to predict the the number of bladder cancer deaths of a randomly selected country that has a cigarette sales of 54 cigarettes/person Select an answer yes you can use the regression equation for any value of X no this X-value is not between Xmin and Xmax yes this X-value is between Xmin and Xmax Looking at your answers above predict the the number of bladder cancer deaths for the one above that it made sense to do so Make sure you use the stored equation and not the rounded equation from part c Round final answer to 4 decimal places The predicted the number of bladder cancer deaths for a randomly selected country that has a cigarette sales of cigarettes/person is g) Compute the residual for the following ordered pair in the data (2918 499) Make sure you use the stored equation and not the rounded equation from part c Round final answer to 4 decimal places The residual for the country with a cigarette sales of 2918 cigarettes/person is Interpret what this value means in the context of this problem The actual the number of bladder cancer deaths of a randomly selected country with a cigarette sales of 2918 cigarettes/person is Select an answer below above what was predicted

Migration is the movement of either people or animals from one area to another Migration can be used for the journey from one place to another or for the act of movement Any population whether it be that of humans animals the mold growing on bread or the bacteria living in your intestines will grow if more organisms are Population Growth d (Genetically modified organisms) or born than are dying The number of births in a population is called the birth rate (natality) The number of organisms that are dying in a population is called the death rate (mortality) Thus if the birth rate is greater than the death rate a population will grow If the death rate is greater than the birth rate then the population will decrease Activity Stare at Me Direction Use the table below to answer the following questions The table shows the human population of Sarangani in thousands