For items 11 to 14: A study was conducted to investigate the interactionsbetween California sheephead, macroalgae, and urchins. The output pathdiagram of the study is given below:sheepheadbomahn dentyfeyastesecerallinege11. Which of the following is(are) TRUE about the experiment?I. Urchin density is an exogenous variable.II. There are a total of four (4) structural equations that can be modelled.O A. I onlyB. Il onlyOC. Both I and IIO D. Neither I nor Il< O O

An exogenous variable is a variable which is fixed in the sense that it is not affected by other…

Answered: For items 11 to 14: A study was…

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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Question 2 Determine the correlation coefficient for the data shown in this table: 3 8. 10 14 16 17 y 43 37 28 22 20 12 a) O-0.9751 b) O-0.9508 c) O 0.9508 d) O 0.9751 e) O-0.4875 f) O None of the above
QUESTION 3 Find the nearest neighbor statistic for the following pattern assuming a study area of 40 km2. 3.5 km 1 km 2.5 km 1 km 3 km 1 km 2 km O 1.47853 1.13547 1.29972 O 1.39774
Question 12 Answer the following questions related to the following dendrogram. 1. Draw the nested diagram corresponding to the dendrogram 2. What are the clusters if we want to partition the data into 3 clusters? 0.25 0.2 0.15 11 0.1 0.05 0 Figure 5: Hierarchical clustering: dendrogram
Question 2 Six samples of five observations each have been taken of 80 kg concrete slabs produced by a machine and the results is showed below. a) Please choose the suitable control charts to test whether or not the process is in control. b) A new sample results in the following slab weights: 81.0, 81.0, 80.8, 80.6, and 80.5. Judge whether or not the process is in control based on the data (including new sample data). c) Based on the data in part b), the specification for the concrete slabs is 78kg to 81kg, is the specification being met? Using the formulation o=A₂R (n is sample size and A2 refers to tables in Week 8 slide) to estimate the standard deviation from average range. 1 79.2 78.8 80.0 78.4 81.0 2 80.5 78.7 81.0 80.4 80.1 3 79.6 79.4 80.4 80.3 80.8 Sample 4 78.9 79.4 79.7 79.4 80.6 5 80.5 79.6 80.4 80.8 78.8 6 79.7 80.6 80.5 80.0 81.1
For each of the following epidemiological scenarios, draw a DAG that represents the relationships between the variables: A researcher is studying the association between experiencing childhood abuse (A) and the occurrence of depression (D) as an adult. She has reason to believe that alcohol consumption (C) may mediate the relationship between (A) and (D).
Question 2 Use the following information to set up a 2 x 2 table and calculate appropriate measure of association. The following are the results from a population-based study to investigate whether high fat consumption is a risk factor for coronary heart disease (CHD): A total of 450 patients were selected from various hospitals and a total of 702 participants without CHD matched by age and sex were selected from the neighborhood where patient lived. A total of 405 CHD patients and 324 controls reported eating fatty food and the remaining reported normal diet. e) Interpret your results.
Question 2 Use the following information to set up a 2 x 2 table and calculate appropriate measure of association. The following are the results from a population-based study to investigate whether high fat consumption is a risk factor for coronary heart disease (CHD): A total of 450 patients were selected from various hospitals and a total of 702 participants without CHD matched by age and sex were selected from the neighborhood where patient lived. A total of 405 CHD patients and 324 controls reported eating fatty food and the remaining reported normal diet. c) What is the exposure of interest?
Given are five observations for two variables, x and y. 11 9. 22 18 Yi 59 48 54 13 21 a. Choose the correct scatter diagram for these data: A. y y 60 60 50 50 40 40 30 30 -20 20 10+ 10 10 20 30 40 50 60 X 10 20 30 40 50 60 x C. D. y y 60 60 50 50 40 40 30 30 B.
Consider the following data set. Draw a dotplot for the given data set. 03 n = 10 measurements: 8, 5, 6, 9, 4, 5, 7, 8, 4, 6 03 . 4 + 4 USE SALT 5 5 6 · 6 7 7 . 8 : 8 9 ↑ 9 10 10 Ⓒ 4 . 5 6 . 7 . 8 9 Are the data mound-shaped? Can you use Tchebysheff's Theorem to describe the data? The Empirical Rule? Explain. O The data set is not mound-shaped. Hence we can use Empirical Rule, but not the Tchebysheff's Theorem to describe the data. O The data set is relatively mound-shaped. Hence we can use Tchebysheff's Theorem, but not the Empirical Rule to describe the data. O The data set is relatively mound-shaped. Hence we can use Empirical Rule, but not the Tchebysheff's Theorem to describe the data. O The data set is relatively mound-shaped. Hence you can use both Tchebysheff's Theorem and the Empirical Rule to describe the data. O The data set is not mound-shaped. Hence we can use Tchebysheff's Theorem, but not the Empirical Rule to describe the data. 10 Q 03 4 5 6 7 9 10
Match each scatterplot shown below with one of the four specified correlations Please help
QUESTION 10 Obtain the five-number summary for the given data. The weekly salaries (in dollars) of sixteen government workers are listed below. 690 607 813 642 728 587 475 622 523 671 685 452 563 787 498 826 452, 543.0, 632.0, 709, 826 O452, 523, 622, 690, 826 452, 533.00, 632.0, 718.5, 826 452, 533.00, 622, 718.5, 826 00
1. Consider the following data set: -2 -1 0 1 4. 3 3 1 Calculate ở2, Var(Bo) Var(B,) and se(B), without using any statistical software.

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For items 11 to 14: A study was conducted to investigate the interactions between California sheephead, macroalgae, and urchins. The output path diagram of the study is given below: sheephead oman lensity dety ver tee