CarPro specializes in renting cars for students going on spring break. Due to the long travel distances, the company carefully controls the miles-per-gallon that the cars get. Sample data are given below. The process standard deviation is not known. Construct an X-bar and R-chart with the data.

Observation
Sample 1 2 3
1 20.4 20.2 21.4
2 19.3 20.5 20.8
3 21.1 20.8 20.1
4 21.1 19.7 20.5
5 20.1 21.1 19.5

True or false: a fitted model with more predictors will necessarily have a lower training set error than a model with fewer predictors.

When sending a claim to an insurance company for services provided by the physician, why are both icd-10 and cpt codes required to be submitted? how are these codes dependent upon each other? what would be the result of not submitting both codes on a medical claim to an insurance company?

Suppose portugal has 700 workers and 26,000 units of capital, and france has 18,000 workers and 700 units of capital. technology is identical in both countries. assume that wine is the capital-intensive good and cloth is the labor-intensive good. which of the following statements is correct if the nations start trading with each other? a) wages will increase in portugal.b) rental rates in france will increase.c) wages in france will decrease.d) rental rates in portugal will increase.