(IN SAS) Consider the text file called muscle which consists of paired data of individual's musclemass and age. We want to examine this relationship.a. Begin by looking at a scatterplot and finding the correlation. Does the association looklinear? How strong is it?b. Produce the necessary diagnostic plots to prepare to fit a regression model.c. Using this information, would you recommend going ahead and fitting a simple linearregression model to this data? (Do not fit the model yet, just answer yes or no andprovide evidence) mass age82.0 71.091.0 64.0100.0 43.068.0 67.087.0 56.073.0 73.078.0 68.080.0 56.065.0 76.084.0 65.0116.0 45.076.0 58.097.0 45.0100.0 53.0105.0 49.077.0 78.0

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Answered: (IN SAS) Consider the text file called…

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 equation of a regression line, unlike the correlation, depends on the units we use to measure the explanatory and response variables. Here is the data on percent body fat and preferred amount of salt. Preferred amountof salt x 0.2 0.3 0.4 0.5 0.6 0.8 1.1 Percent body fat y 20 31 22 29 39 22 30 In calculating the preferred amount of salt, the weight of the salt was in milligrams. (a) Find the equation of the regression line for predicting percent body fat from preferred amount of salt when weight is in milligrams. (Round your answers to one decimal place.) ŷ = ? + ? x (b) A mad scientist decides to measure weight in tenths of milligrams. The same data in these units are as follows. Preferred amountof salt x 2 3 4 5 6 8 11 Percent body fat y 20 31 22 29 39 22 30 Find the equation of the regression line for predicting percent body fat from preferred amount of salt when weight is in tenths of milligrams. (Round your intercept to one decimal place and your slope…
True or false? If the statement is false, use one or two sentences to justify your answer.
please answer the question and show work!! thank you also please make sure if writing on paper handwriting can be read thank you again :)
Stoaches are fictional creatures that nest in truffula forests. A researcher wants to know whether there is a relationship between a stoach’s wingspan (?W, the predictor) and its nest height (?H, the response). A sample of 85 stoaches is observed, and for each, the wing-span (in cm) and the nest height (in m) are recorded. The observed data meet the assumptions for a linear regression, so the researcher fits the regression model and obtains a regression equation ℎ̂=−4.273+0.834?,h^=−4.273+0.834w, with standard error for the coefficient of ?w equal to 0.242. Determine the ?p-value from a test for a statistically significant linear dependence of nest height on wing-span. (Give your answer to 4 decimal places.
Do movies of different types have different rates of return on their budgets? Here's a regression of USGross (SM) on Budget for comedies and action movies with an indicator variable. Complete parts (a) through (d). Dependent variable is: USGross ($M) Coefficient SE(Coeff) - 6.78278 16.95 1.00523 Variable Constant Budget ($M) Comedy 24.0373 0.1613 11.73 t-ratio P-value -0.400 0.6907 6.23 <0.0001 2.05 0.0451 a) Write out the regression model. USGross = + ( Budget + (Comedy R-squared = 32.8% R-squared (adjusted) = 31.0% s = 47.51 55 degrees of freedom
a) Determine the correlation coefficient, r, and interpret this value in the context of the problem. (Round 4 decimal places)b) Find the equation of the regression line for the given data. (Round the slope and y-intercept 4 decimal places).c) Give a practical interpretation of the slope of the regression line.
In a fisheries researchers experiment the correlation between the number of eggs in tge nest and the number of viable (surviving ) eggs for a sample of nests is r=0.67 the equation of the regression line for number of viable eggs y versus number of eggs in the nest x is y =0.72x + 17.07 for a nest with 140 eggs what is the predicted number of viable eggs ?
A researcher is interested in examining the relationship between spousal abuse and child abuse. Specifically, they are interested in determining whether there is a predictive relationship between spousal abuse and child abuse in 5 county social services offices. Calculate the linear regression line for the following data. Note you have already calculated the first step to this analysis (Pearson's Correlation)
A draft research report shows the following descriptive statistics on the relationship between blood pressure and height for a large representative sample of American men: average height 70 inches average blood presssure 124 mm correlation between height and blood pressure - 0.2 It also shows the following regression equation for predicting blood pressure from height: predicted blood pressure = (-0.9 mm per inch) × height + 163 mm Is there anything evidently wrong with these results? Choose one option, and briefly explain your answer below. i. There may be something wrong, but there is not enough information here to decide. ii. Something is definitely wrong. Answer: ? ✓ Explain:

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