no diagram needed for part C 4.1.13 In June 2012, Time magazine ran an article titled"Do Family Dinners Really Reduce Teen Drug Use?" Answerthe following questions in this context.a. Identify the observational units.b. Identify the explanatory and response variables.c. Identify a confounding variable that provides an alter-native explanation for the lower drug use among teenswhose families ate dinner together, compared to thosewhose didn't. Also, include a diagram showing how thisexplanation works.

Answered: Image /qna-images/answer/354303e8-b08a-4fcc-886c-31d3e29a4f11.jpg

Answered: 4.1.13 In June 2012, Time magazine ran…

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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Where a > 0 and b > 0, the graph of the circle x2 + y2 = b2 contains point X in Quadrant II with x-coordinate −a. It also contains a second point Y in Quadrant IV where x = a. Find an expression for the length of XY in terms of a and b. XY=
1.Which quadrant would ( x , y ) be located if -x > 0 and y > 0 ? 2. How many times would you need to use the Midpoint Formula in order to divide a line segment into 16 equal parts ?
Both figures below concern the assessed value of land that includes homes, and both use the same dataset. Complete parts a through b below. K 140000 120000 100000 80000 60000 40000 2 3 4 ㅎㅎ Acreage 140000 120000 100000 80000-. 60000 40000 5.0 75 10.0 12.5 15.0 17.5 Rooms a. Which do you think has a stronger relationship with value of the land-the number of acres of land or the number of rooms in the homes? Why? OA. The number acres land has a stronger more scattered in a vertical direction. with the value of the land, as shown by the fact that the points are OB. The number of acres of land has a stronger relationship with the value of the land, as shown by the fact that the points are less ..
The data below shows the number jobs that a sample of people had in their life time: 8 8 12 12 12 12 13 14 15 15 (a) Is the data categorical or quantitative? quantitative O categorical (b) Are there any outliers? In the box, please justify your answer. Yes O No (c) Find the five-number summary: (Round the answers to 2 decimal places, if applicable) Min Q1 Median Q3 Max
In a recent year, a research organization found that 487 of 806 surveyed male Internet users use social networking. By contrast 619 of 919 female Internet users use social networking. Let any difference refer to subtracting male values from female values. Complete parts a through V below. Assume that any necessary assumptions and conditions are satisfied. Find the proportions of male and female Internet users who said they use social networking. A. What is the difference in proportions? B. What is the standard error of the difference? C. Find a 95% confidence interval for the difference between these proportions.
A scatterplot has a horizontal axis labeled "Wins" from 0 to 24 in increments of 2 and a vertical axis labeled "ERA" from 0 to 6 in increments of 0.5. The following points are plotted: 9 units to the right of and 5.2 units above the origin; 11 units to the right of and 3.9 units above the origin; 12 units to the right of and 4.3 units above the origin; 14 units to the right of and 3.9 units above the origin; 16 units to the right of and 3.7 units above the origin; 17 units to the right of and 2.6 units above the origin; 18 units to the right of and 3.4 units above the origin; 20 units to the right of and 2.7 units above the origin. A line falls from left to right and passes through the points (10, 5.3) and (20, 2). All coordinates are approximate. Part 3 (a) Predict the ERA for 5 wins, if it is meaningful. Select the correct choice below and, if necessary, fill in the answer box within your choice. A. ModifyingAbove y with caretequals enter your response here (Round to two…
The data below shows the number jobs that a sample of people had in their life time: 8 8 12 12 12 12 13 14 15 15 (a) Is the data categorical or quantitative? quantitative Ocategorical (b) Are there any outliers? In the box, please justify your answer. Yes No (c) Find the five-number summary: (Round the answers to 2 decimal places, if applicable) Min Q1 Median Q3 Маx 8 10 12 14.5 8 (d) Choose the correct boxplot:

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