# Mathematics and Statistics

## Data Processing, Weighting, Non-Responses, MCAR, MAR, and MNAR

1) Missingness mechanisms: a. Describe the difference between MCAR, MAR and MNAR missingness. b. Give an example where you would expect to find missingness of each of these types in survey research. . 2) Describe 3 methods of handing item nonresponse. For each method, list at least one advantage and one disadvantage for this method. […]

## Math 1002 Practice Problems

Glenda Everson Math 1002 Practice Problems 1. Use inductive reasoning to predict the next three numbers in the pattern (or sequence). 4, −20, 100, −500, . . . Step 1: Form a Hypothesis: Step 2: Make observations related to the hypothesis: Step 3: Come to a conclusion: 2. Flying West New York City is on […]

## Real-Life Applications of Complex or Imaginary Numbers

When solving a quadratic equation using the quadratic formula, it is possible for the b2 – 4ac term inside the square root (the discriminant) to be negative, thus forcing us to take the square root of a negative number. The solutions to the equation will then be complex numbers (i.e., involve the imaginary unit i). […]

## Lagrangian Interpolation

3) If e^1.3 is approximated by Langrangian interpolation from the values of e0=1, e1=2.7183, and e2 =7.3891., what are the minimum and maximum estimates for the error? Compare to the actual error. use MATLAB using “polyfit” and “polyval” functions 4) Repeat above problem but now extra polate to get e^2.7. NOTE: Find Lagrange p6(x) by […]

## Lagrangian Interpolation

If e^1.3 is approximated by Langrangian interpolation from the values of e0=1, e1=2.7183, and e2 =7.3891., what are the minimum and maximum estimates for the error? Compare to the actual error. use MATLAB using “polyfit” and “polyval” functions 4) Repeat above problem but now extra polate to get e^2.7. NOTE: Find Lagrange p6(x) by hand […]

## Real-Life Examples of Parabolic Shapes

Select and discuss two examples of real life objects that incorporate the parabolic shape. Explain why the parabolic shape was used for the objects. Parabolic shape is used in dish antennas that collect wireless signals from television/ internet signal transmitters on household tops. The parabolic surface of the dish … Solution Summary Real-life examples of […]

## Regression Analysis – Using PHStat or Excel

[1] A research analyst for an oil company wants to develop a model to predict miles per gallon based on highway speed. An experiment is designed in which a test car is driven at speeds ranging from 10 miles per hour to 75 miles per hour. The results are in the data set (SPEED.xls). a) […]

## Integrals

For what values of p does the integral converge or diverge? What is the value of the integral when it converges? ∫0–> e x^p ln x dx Please explain your answer. Solution Summary Convergence or divegence of an integral is investigated. The solution is detailed and well presented. To continue with the answer check on […]

## five-number summary of set of numbers and negative numbers

Attached you will find the problems to be completed. I need help in completing the following exercises. I need to use the Equation Editor in Microsoft® Word to do these problems, then submit a Word document, showing the work and answers. (first 20 are multiple choice) These are the problems I need help with: 1. […]

## Polynomial Identities

Polynomial Identities and Proofs Essential Questions: • How can polynomial identities be proven? • What can polynomial identities apply to beyond just polynomials? It’s time to show off your creativity and marketing skills! You are going to design an advertisement for a new polynomial identity that you are going to invent. Your goal for this […]

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