Question: Recall the linear mixed model (also called growth curve model) we fit in class forchildrens bone length data. Briefly, bone length (outcome) was measured at

Recall the linear mixed model (also called growth curve model) we fit in class forchildrens bone length data. Briefly, bone length (outcome) was measured at ages8, 8.5, 9, and 9.5. We fit a linear mixed model to predict bone length using arandom intercept and slope (for age), and fixed age, i.e.,

a. Write out the Xi matrix for this model.

b. Are the random intercept and random age term appropriate for this model?

c. Recall when we added sex to the model in class, the covariate did not significantly predict bone growth. Should we leave sex in the model? Why or why not?

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Recall the linear mixed model (also called growth curve model) we fit in class for children?s bone length data. Briefly, bone length (outcome) was measured at ages 8, 8.5, 9, and 9.5. We fit a linear...

Use the linear mixed model (also calledgrowth curve model) for children'sbone length data. Briefly, bone length (outcome) was measured at ages 8, 8.5, 9, and 9.5. We fit a linear mixed model to...

Examine the pricing strategies in the gasoline market. Make sure to address the following topics: In the article, (Mixed) Strategy in Oligopoly Pricing: Evidence from Gasoline Price Cycles Before and...

STATISTICS FOR DECISION MAKING Dr. Azar Abizada HOMEWORK 4 Due Date: Wednesday, March 11th class time Problem 1 (26 points): Be careful, each part of this question is independent of one another. a)...

Exercises Chapter 2 2.1 Marginal and conditional probability: The social mobility data from Section 2.5 gives a joint probability distribution on (Y1 , Y2 )= (father's occupation, son's occupation)....

Part One: research critique analysis: State the problem and purpose. Is it clear? Is the problem significant to nursing? Are the research questions/hypotheses expressed clearly? Are the research...

Lecture Notes DL MGT 5100 - Distribution Management Spring 2017 1.0. Day one, Monday, Monday, 9 Jan 17 1.1. Reading Assignments: Chapters 1 and 2 1.1.1. I intend to follow the book so as to provide a...

If a companys stock is currently selling for $12 per share and its price earnings ratio is 6, what are its earnings per share? What does this figure mean? $12 -32.00 Fr Ian

Write a memorandum identifying and explaining potential problem areas where misstatements in the current-year financial statements could exist.

Create a procedure named FindThrees that returns 1 if an array has three consecutive values of 3 somewhere in the array. Otherwise, return 0. The procedures input parameter list contains a pointer to...

A company issues 1,050 shares of its common stock for $33,600 cash. Prepare journal entries to record this event under each of the following separate situations.