2. In a study conducted by the tobacco company, it was found that the years lived of a person wasnegatively correlated with number of cigarettes smoked per day. In another study, a sample is takenand the data on number of cigarettes smoked per day and years lived are collected. The data is shownas follows.No. of cigarettes per day 82240 | 42506078 8235Years lived71 6268615953504565a) Identify the independent and dependent variables.b) Draw a scatter diagram and give comment.c) Calculate correlation coefficient (r) and interpret its value.d) Calculate the coefficient of determination (r2) and interpret its value.e) Find the predicted regression model. Hence, interpret the regression coefficient.f) Does the recent study support the previous findings?

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Answered: 2. In a study conducted by the tobacco…

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 table shows the results from a random survey asking participants their age and current systolic blood pressure. Age (years) 24 26 30 34 36 45 50 55 Systolic Blood Pressure 108 104 132 119 128 140 135 146 If a student correctly makes a scatter plot of the data from the survey, which statement is true? O There are no outliers in the data. O There is a negative association in the data. O There is a nonlinear association in the data. O There is at least one outlier in the data.
A research conducts a study to identify the relationship between variable A and Variable B. The data collected from a random sample is presented in Table 2 Subject Dependent Variable Independent Variable (variable A) (variable B) 1 23.5 19.6 2 21.5 24.7 3 17.5 16.9 4 45.6 22.1 32.1 26.4 6 61.0 55.2 7 15.9 21.5 8 22.6 77.2 9. 34.5 35.8 10 22.1 23.9 11 26.4 23.7 12 23.5 24.2 13 59.9 60.5 14 45.7 46.0 15 43.2 44.1 16 28.4 29.3 17 54.8 55.9 18 37.4 23.5 19 42.3 59.9 20 32.1 45.7 a. What is the suitable correlation test for analyzing the data? b. Analyze the data by using the calculation method. What percentage of the variance in variable A is influenced by Variable B? Explain your answer. c. Report the results of the analysis
You wish to determine if there is a positive linear correlation between the age of a driver and the number of driver deaths. The following table represents the age of a driver and the number of driver deaths per 100,000. Use a significance level of 0.05 and round all values to 4 decimal places. Driver Age Number of Driver Deaths per 100,000 64 32 55 30 72 36 34 30 31 18 16 29 21 22 32 18 46 24 46 31 Ho: ρ = 0Ha: ρ > 0 Find the Linear Correlation Coefficient r = Find the p-value p-value = The p-value is Greater than αα Less than (or equal to) αα The p-value leads to a decision to Do Not Reject Ho Reject Ho Accept Ho The conclusion is There is a significant linear correlation between driver age and number of driver deaths. There is a significant negative linear correlation between driver age and number of driver deaths. There is a significant positive linear correlation between driver age and number of driver deaths. There is…
1)After training, six workers underwent a test and later measured the productivity of each of them. From the re- results presented in the table beside, calculate the correlation coefficient between the test score and the productivity.
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You have been asked to find if there is a correlation between the amount of calories per serving in a bowl of cereal versus the amount of sugar (in grams) in the cereal. The following data has been given Which variable is the predictor and which variable is the response Sugar Calories 18 200 23 210 12 170 12 190 37 220 19 175 23 201 22 210 32 210 11 190 11 197 29 205
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