1)Determine the coefficient of determination (r²)Complete the following sentence:% of the variation in the score can be explained by the variationinPredict the score of a learner driver after 12 hours of instruction time to the nearest pointPredict the score of a learner driver after 50 hours of instruction time to the nearest pointComment on the reliability of the predictions made in both parts (v) and (vi) The effect of the amount of instruction on driving skill was tested by selecting at random 7 learner drivers.The learner drivers were given a score on a driving skills test. The number of hours of instruction for eachlearner was recorded.The results are shown in the table below.Hours ofinstruction19Score (points) 32(i)91916(c) Remove the outlier from the data set, and4(a) State the dependent (or response) variable for this situation23 1625 26 1415(b) Which of the data points do you believe is the most likely to be an outlier?3630Determine the equation for the least squares regression line and write it down in terms ofthe variables score and hours. Give the coefficients correct to 2 decimal places.

Hours of instructionScore19329191623416251526361430

Answered: The effect of the amount of instruction…

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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Which set of variables has correlation and causation? A. distance traveled and money spent on gas B. distance traveled and money spent on snacks C. distance traveled and number of drinks consumed D. distance traveled and time spent listening to music
Suppose you were to collect data for the following pair of variables, drivers: blood alcohol level, reaction time. You want to make a scatter plot. Which variable would you use as the explanatory variable? Blood alcohol or reaction time? Which variable would you use as the response variable? Blood alcohol or reaction time? Would you expect to see a positive or negative association? Or neither?
The Grand Canyon and the Colorado River are beautiful, rugged, and sometimes dangerous. Assume there is a physician at the park clinic in Grand Canyon Village. Suppose the physician has recorded (for a 5-year period) the number of visitor injuries at different landing points for commercial boat trips down the Colorado River in both the Upper and Lower Grand Canyon. Upper Canyon: Number of injuries per Landing Point Between North Canyon and Phantom Ranch 2 311 3 4 8 11 3 1 3 Lower Canyon: Number of injuries per Landing Point Between Bright Angel and Lava Falls 10 1 10 89 2 11 3 0 1 10 2 The mean, median, and mode for Upper Canyon are 3.636, 3.0, and 3, respectively. The mean, median, and mode for Lower Canyon are 4.286, 2.0, and 1, respectively. Compare the mean, median, and mode found in Upper Canyon and Lower Canyon, respectively.
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A teacher is concerned that she may be biased in her interaction with students. She keeps track of the number of interactions she has with her students and also notes the student's gender. She records the results in a contingency table. Interaction YES NO Boy 7 13 Girl 15 Is there a significant relationship between the interactions and the student's gender, using a = .05?
I can't understand why the data is the percentage of surveyed parents.
Suppose you were to collect data for the following pair of variables, ski diving: depth, visibility. You want to make a scatterplot. Which variable would you use as the explanatory variable? depth visibility Which variable would you use as the response variable? O depth O visibility Would you expect to see a positive or negative association? positive negative O neither
Caden then performs a significance test. First, he performs 100 simulations. For each simulation, he randomly reorganizes the subjects into two groups, A and B, of size 10. In the simulations, group A plays the role of the treatment group and group B plays the role of the control group. After each simulation, he subtracts the average for group B from the average for group A. The distribution of the differences for all 100 simulations is shown in the histogram. 30 28 26 24 22 12 10 6. 2 Group A avg. - Group B avg. In the original experiment, the average for the treatment group was 0.8 higher than the average for the control group. Based on the 100 simulations, are the results of the experiment significant at the 5% level? yes no Number of simulations [-2.7, -2.2) [-2.2, -1.7) [-1.7, -1.2) [-1.2, -0.7) [-0.7, -0.2) [-0.2, 0.3) [0.3, 0.8) [0.8, 1.3) [1.3, 1.8) [1.8, 2.3) [2.3, 2.8)
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Virginia polled a large sample of individuals to find the percentage of students with known food allergies and the percentage of students without known food allergies. Which of the following could sufficiently display the data if only the two given categories are to be included? Select the correct answer below: bar graph pie chart either a pie chart or a bar graph neither a pie chart nor a bar graph
Twenty-nine college students, identified as having a positive attitude about Mitt Romney as compared to Barack Obama in the 2012 presidential election, were asked to rate how trustworthy the face of Mitt Romney appeared, as represented in their mental image of Mitt Romney’s face. Ratings were on a scale of 0 to 7, with 0 being “not at all trustworthy” and 7 being “extremely trustworthy.” Here are the 29 ratings: 2.6 3.2 3.7 3.3 3.4 3.6 3.7 3.8 3.9 4.1 4.2 4.9 5.7 4.2 3.9 3.2 4.5 5.0 5.0 4.6 4.6 3.9 3.9 5.3 2.8 2.6 3.0 3.3 3.7 a 95% confidence interval for the mean rating. Is there significant evidence at the 5% level that the mean rating is greater than 3.5 (a neutral rating)?

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