1.56 Longleaf pine trees. The Wade Tract in ThomasCounty, Georgia, is an old-growth forest of longleaf pinetrees (Pinus palustris) that has survived in a relativelyundisturbed state since before the settlement of the area byEuropeans. A study collected data on 584 of these trees.One of the variables measured was the diameter at breastheight (DBH). This is the diameter of the tree at 4.5 feet,and the units are centimeters (cm). Only trees with DBHgreater than 1.5 cm were sampled. Here are the diametersof a random sample of 40 of these trees: PINES2710.513.326.018.352.29.226.117.6 40.5 31.847.211.4 2.769.3 44.416.935.75.4 44.22.24.37.8 38.12.211.4 51.54.939.7 32.6 51.843.62.344.6 31.540.322.3 43.337.5 29.127.9(a) Find the five-number summary for these data.(b) Make a boxplot.(c) Make a histogram.(d) Write a short summary of the major features of thisdistribution. Do you prefer the boxplot or the histogramfor these data?

Answered: 1.56 Longleaf pine trees, The Wade…

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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Zhou and Vohs (2009) published a study showing that handling money reduces the perception of pain. In the experiment, a group of college students was told that they were participating in a manual dexterity study. Half of the students were given a stack of money to count and the other half got a stack of blank pieces of paper. After the counting task, the participants were asked to dip their hands into bowls of very hot water (122° F) and rate how uncomfortable it was. The following data show ratings of pain similar to the results obtained in the study. Counting Money Counting Paper 7 9 8 11 10 13 6 10 8 11 5 9 7 15 12 14 5 10 Convert the data from this problem into a form suitable for the point-biserial correlation (use Y = 1 for the money and 0 for the plain paper), and then compute the correlation. ∑X ∑Y ∑XY SSXX SSYY SP r Square the value of the point-biserial correlation to obtain r².…
Given the data given, answer questions 1-3. Show solution during computation
Exhibit 1 Below is a partial Excel output based on a sample of 25 observations. Coefficients 145.321 Standard Error 48.682 Intercept x1 25.625 9.150 x2 -5.720 3.575 x3 0.823 0.183 Refer to Exhibit 1. The interpretation of the coefficient on xı is that: Select one: O a. It is impossible to interpret the coefficient. a one-unit change in x1 will lead to a 25.625-unit increase in y when all other variables are held constant O b. O c. a one-unit change in x1 will lead to a 25.625-unit change in y d. a one-unit change in x1 will lead to a 25.625-unit increase in x2 when all other variables are held constant
conline.austincc.edu/webapps/assessment/take/launch.jsp?course_assessment_id%3= 756751_1&course_id= 846. * Question Completion Status: QUESTION 3 An elementary school student comes down with a stomach virus the day after she swims at the local pool. Her father warns other parents at the school that the pool is unsanitary and causes virus to spread. What should the parents conclude? Choose the best answer. O The pool is indeed unsanitary and causes viruses to spread. O The pool is not unsanitary and does not cause viruses to spread. O There is an association between people visiting the pool and increased reports of viruses. O There is no association between people visiting the pool and increased reports of viruses. O Nothing can be concluded because this is an anecdote. QUESTION 4 10 Is the following an observational study or an experiment? Take a random sample of people at a fitness center. Ask them if they use resistance bands or not. Compare the average muscle mass for those who do…
a) The following frequency distribution shows the 50 objects of masses measured nearest to grams. Construct the graphical representation to this data and also interpret the figure.
Can someone help me with #2 ??
QUESTION 4 Determine whether the given percentage is a statistic or a parameter and why. In a study of all 1018 students at Guttman, data showed that 10% live in Queens. a. Parameter because the value is a numerical measurement describing a characteristic of a sample. b. Statistic because the value is a numerical measurement describing a characteristic of a sample. c. Parameter because the value is a numerical measurement describing a characteristic of a population. d. Statistic because the value is a numerical measurement describing a characteristic of a population.
Question 22 A parameter is O A. A value that can be calculated from the sample. B. A value that can be calculated only if we get data from an entire population. OC. A value associated with a characteristic of a population. OD. A value associated with a characteristic of a sample.
12)
Graphing data is usually the best way to see patterns in the data and to look for possible problems. Because graphs also have their limitations, it's often a good idea to also look at the raw data in the form of a frequency distribution table. The frequency distribution table consists of the categories you are going to measure (X) and the number or frequency of the individuals or responses in each category (f).\ Frequency Distribution Table Frequency Distribution of Number of Violations No. of customers observed exceeding limit (X) Frequency of occurrence, observation periods (f) 5 1 8 2 14 17 4. 12 5. 6. 6 or more
If we were to plot the IQ scores of every person living in the United States on a graph, we would end up with: O a downward sloping line. O a vertical line. O a uniform ditribution- that is, a straight horizontal line. O a bell-shaped curve.

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