community setting. The following is adapted from the National Panel Study of COVID-19 by Vargas et al. A key finding of this study is: "Whether or not an American wears a facemask in public probably has a lot to do with their political affiliation". Results consistent with the survey conducted between April 14 and April 21, 2020 are summarized in the table below: Masked Unmasked Total Democrats 829 309 1138 Republicans 640 445 1085 Round all calculated values in this problem to 4 decimal places. 1. Provide a point estimate for the population proportion of Democrats who wore a mask to help prevent the spread of COVID-19 at the time of the survey. p = 0.37292 2. Construct a 90% confidence interval for the population proportion of Democrats who wore a mask to help prevent the spread of COVID-19 at the time of the survey. 0.356048 0.3897919 3. Which of the following conditions must be met for the confidence interval to be valid? Select all that apply. OA. The observations must be independent of one another. OB. There must be at least 10 'success' and 10 'failure' observations. C. The sample size must be at least 30 or the population data must be normally distributed. OD. There must be an expected count of at least 5 in every cell of the table.
Family of Curves
A family of curves is a group of curves that are each described by a parametrization in which one or more variables are parameters. In general, the parameters have more complexity on the assembly of the curve than an ordinary linear transformation. These families appear commonly in the solution of differential equations. When a constant of integration is added, it is normally modified algebraically until it no longer replicates a plain linear transformation. The order of a differential equation depends on how many uncertain variables appear in the corresponding curve. The order of the differential equation acquired is two if two unknown variables exist in an equation belonging to this family.
XZ Plane
In order to understand XZ plane, it's helpful to understand two-dimensional and three-dimensional spaces. To plot a point on a plane, two numbers are needed, and these two numbers in the plane can be represented as an ordered pair (a,b) where a and b are real numbers and a is the horizontal coordinate and b is the vertical coordinate. This type of plane is called two-dimensional and it contains two perpendicular axes, the horizontal axis, and the vertical axis.
Euclidean Geometry
Geometry is the branch of mathematics that deals with flat surfaces like lines, angles, points, two-dimensional figures, etc. In Euclidean geometry, one studies the geometrical shapes that rely on different theorems and axioms. This (pure mathematics) geometry was introduced by the Greek mathematician Euclid, and that is why it is called Euclidean geometry. Euclid explained this in his book named 'elements'. Euclid's method in Euclidean geometry involves handling a small group of innately captivate axioms and incorporating many of these other propositions. The elements written by Euclid are the fundamentals for the study of geometry from a modern mathematical perspective. Elements comprise Euclidean theories, postulates, axioms, construction, and mathematical proofs of propositions.
Lines and Angles
In a two-dimensional plane, a line is simply a figure that joins two points. Usually, lines are used for presenting objects that are straight in shape and have minimal depth or width.
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