2.86 Shaft graves in ancient Greece. Refer to the AmericanO Journal of Archaeology (Jan. 2014) study of sword shaftSHAFTS graves in ancient Greece, Exercise 2.60 (p. 61). The num-ber of sword shafts buried at each of 13 recently discoveredgrave sites is reproduced in the following table.1 2 3 1 5 6 2 4 1 2 4 2 9Source: Harrell, K. "The fallen and their swords: A new explanation for therise of the shaft graves." American Journal of Archaeology, Vol. 118, No. 1,January 2014 (Figure 1).a. Calculate the range of the sample data.b. Calculate the variance of the sample data.c. Calculate the standard deviation of the sample data.

Answered: Image /qna-images/answer/fd65d58d-74ee-4005-8024-7771bb58c6a4.jpg

Answered: 2.86 Shaft graves in ancient Greece.…

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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The data that appears below are the weights (in pounds) of 15 packages of ground beef in Supermax supermarket refrigerators: 1.28, .90, 1.29, 1.15, .93, 1.18, .89, 1.12, 2.33, 1.94, 2.14, 2.6, 1.11, 1.9, 1.2 (Mendenhall et al., 2015).a) Construct a stem-and-leaf plot to show the distribution of these weights.b) Find the mean and standard deviation of the data set.
See enclosed image.
Hours Exam Grades 1 62 2 66 2 68 2 67 3 74 3 78 3 75 4 76 4 81 5 82 6 82 6 85 7 88 8 86 9 84 9 89 9 92 10 86 11 97 12 91 Task: The following data set describes the hours a sample of scholars put into studying and the Exam scores they received. Answer the following questions Create a scatterplot of hours studied vs. exam score Write 2-3 research questions for this study and supporting Hypotheses. Is there a relationship between hours vs exam scores? Describe the trends you observed from the scatterplot between the two variables. What is the value of the correlation coefficient? Briefly explain what this result means. Create a scatterplot of hours studied vs. exam score with a regression line. Find an equation with the following form that best describes the relationship between the two variables: ŷ = b0 + b1x where: ŷ: The predicted value of the response variable b0: The y-intercept (the value of y when x is equal to zero) b1: The…
2) c) Compare the results to the Empirical Rule. Could you answer this question? Thanks.
The boxplot shown below results from the heights (cm) of males listed in a data set. What do the numbers in that boxplot tell us? 154 173.8 194 169.7 183.5 The minimum height is cm, the first quartile Q, is cm, the second quartile Q, (or the median) is cm, the third quartile Q, is cm, and the maximum height is cm. (Type integers or decimals. Do not round,)
QUESTION 2 A researcher has conducted a sample survey about games addiction of secondary school students in certain district of country ABC. Luckily, it was found that only 20% of students were among the addicted students, even though total result from population study for the whole country of ABC showed that on average 80% of the secondary students were addicted. a) What is the population of interest? b) What is the sample? c) What is the value of parameter? d) What is the value of statistic?
15. Diameter of Douglas Fir Trees The diameter of the Douglas fir tree is measured at a height of 1.37 meters. The S following data represent the diameter in centimeters of a random sample of 12 Douglas firs in the western Washington Cascades. 156 162 147 173 147 190 130 101 159 113 181 109 Source: L. Winter. "Live Tree and Tree-Ring Records to Reconstruct the Structural Development of an Old-Growth Douglas Fir/Western Hemlock Stand in the Western Washington Cascades." Corvallis, OR: Forest Science Data Bank, 2005. (a) Obtain a point estimate for the mean and standard deviation diameter of a Douglas fir tree in the western Washington Cascades. (b) Because the sample size is small, we must verify that the data come from a population that is normally distributed and that the data do not contain any outliers. The figures show the normal probability plot and boxplot. The correlation between the tree diameters and expected z-scores is 0.982. Use Option 1 or Option 2 to determine if the…
As suggested in your assigned readings this week, researchers in psychology who are attempting to make a causal claim typically prioritize ________ over ___________ validity. Group of answer choices internal; external internal; statistical external; internal construct; internal
note:- please send me answer in typed form strictly prohibited hand written solution
Remaining Time: 1 hour, 24 minutes, 28 seconds. a Question Completion Status: 1 8. 10 Quèstión 7 Exhibit 11-6 The results of a recent poll on the preference of shoppers regarding two products are shown below. Shoppers Favoring This Product Product Shoppers Surveyed A 800 560 B 900 612 Refer to Exhibit 11-6. The point estimate for the difference between the two population proportions in favor of this product is O a. 0.02 b. 52 c. 100 Od. 0.44 A Moving to another question will save this response.
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