What is the primary purpose of using `train_test_split` in machine learning workflows?

Near the end of a marathon race, the first two runners are separated by a distance of 35.0 m. The front runner has a velocity of 3.75 m/s, and the velocity of the second runner relative to the front runner is 1.50 m/s.  What is the velocity (units: m/s) of the second runner? NOTE: Use correct rounding and significant figures in the answer Enter numerical answer in proper standard notation, not scientific notation Do not enter units with the answer

In scikit-learn, what does the term features refer to in a dataset?

After fitting a `LinearRegression` model (named `model`), how can you access the learned coefficients (slopes) of the linear equation?

In the function call below, which argument is passed as a keyword argument, and what is the key difference between positional and keyword arguments? X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

When bad drivers line up to purchase collision insurance, automobile insurers are subject to the

Assume the economy experiences a negative supply shock. Under an inflation targeting regime, what policy dilemma does the central bank face?

Suppose the Fed increases the discount rate while also increasing the interest on excess reserves. Which of the following outcomes is most consistent with these simultaneous actions?

Under fractional reserve banking, if the central bank decreases reserve requirements while holding excess reserve interest constant, what is the likely immediate effect?

In considering the role of antidiuretic hormone (ADH) in the regulation of fluid balance and water homeostasis in a patient with hypovolemia or hypernatremia, the AGACNP knows that: