Blog

A student interested in Finance was interested in predicting sales ($M) based on assets ($M). She looked at data from 97 companies. She found the following equation.  yhat = 648.43 + 0.95x One of the companies had assets of [x1] and a sales of [obsy]. Find the residual and round to two decimal places. (Remember to include the negative sign if appropriate.) 

A researcher was interested in estimating the literacy rate for a country based on the number of newspapers sold (per 1000 people), the number of radios (per 1000 people), and the number of TV sets (per 1000 people).  They found the following output from JMP.  (n = 20)  Predictor Coef SE Coef T p-value constant   0.51486   0.09368  5.50 0.002 newspaper   0.0005421  0.0008653  0.63 radios -0.0003535  0.0003285 -1.08 television sets  0.001988  0.001550  1.28   Which of the following is the p-value for radios? (Round your answer to four values after the decimal.) 

Data is collected on the number of foreign visitors to a country (millions) and total tourism revenue ($billions) for a sample of 10 countries. The regression equation is  yhat = 21.5 +0.295 visitors. The p-value for the hypothesis (Ho:Beta1 = 0 versus Ha:Beta1 does not equal 0) is 0.16. At the 0.05 level of significance, we  . . .  (Choose answers that correctly finish this statement. There are multiple correct answers, mark all that apply.)

Listed below is the multiple regression equation for predicting Y by X1 through X4. Y = Sales per month X1= Amount spent on printed ads X2= Amount spent on text messages X3= Amount spent on radio ads X4= Amount spent on customer service support   There are a total of n=50 observations used in the analysis.   Y-hat =  12.34 + 1.55 X1 + 0.22 X2 +1.45 X3 + 0.612 X4   The F test statistic equals 2.1. What is the p-value for the overall F test? Round to three decimal places. 

An economist wanted to predict GDP based on various other economic variables. They decided to conduct a multiple linear regression with [k] predictor variables. They took a sample size of [n] countries. Using the ANOVA table below, find the degrees of freedom for error.   Source DF Sum of Squares Mean Square F Ratio model [SSR] error [SSE] total

The hydrostatic pressure in the capillary is caused by __________.

The path of flow of lymph from capillaries to the heart is lymph capillaries – lymphatic vessels – ______ – bigger lymph vessels  – lymphatic ducts – subclavian vein. What is the missing part?

The state of low blood pressure is called:

The pulmonary trunk

What are the key issues confronting Under Armour? What are your recommendations to improve their competitive positioning?