Assignment 1:  It is evident from the medical literature that  mental anxiety has a close relationship with systolic blood pressure (SBP). As a

 

Assignment 1: 

It is evident from the medical literature that  mental anxiety has a close relationship with systolic blood pressure (SBP). As a biostatistician you want to compute this relationship and collected anxiety score and systolic blood pressure (SBP) from a random sample of 20 individuals. Here anxiety score is an independent variable (x) and SBP is a dependent variable mental anxiety (y). The following table shows the data.

Table: Anxiety score and systolic blood pressure

Individual idAnxiety score 0-100Systolic blood pressure 120-200 mmHg11012321312531512542512853513263913574014084514595515010651551165158127016013731601485165158517016881751790185189218519951902098195

1. From the above data set compute the correlation coefficient (r) (10 points)

Note: For using the formula of r, you need to calculate the covariance of (x, y), and variance of x and y.

2. Interpret the computed correlation coefficient (r) (5 points)

3. Compute the least square estimates of  and  (10 points)

Note: For calculation of  and  you need to calculate the mean and standard deviation (s) of x and y.

4. Interpret  and  (5 points)

Previous
 

Share This Post

Email
WhatsApp
Facebook
Twitter
LinkedIn
Pinterest
Reddit

Order a Similar Paper and get 15% Discount on your First Order

Related Questions

Nursing 6692 Module 2 Assignment Summer 2024 Name:

Nursing 6692 Module 2 Assignment Summer 2024 Name: Respond to each of the following on this document—do not delete any of the content. Save the document as a Word file and upload to the appropriate site in the course. 1. Based on the following correlation matrix, what can be said

Looking at two linear inequalities, 5𝑥−2𝑦

Looking at two linear inequalities, 5𝑥−2𝑦<10 and 𝑦≤𝑥, how can you identify the x-intercept of boundary and y-intercept of boundary for equation (1). Also, identify the graph of inequality equation ( 1) as a solid line or a dashed line.  Lastly, provide the procedural steps how to graph these inequalities. Your initial response