The Company Conducted a Study That Investigated Whether the Classical

Multiple Choice

The company conducted a study that investigated whether the classical music while waiting for the operator's response has an effect on the irritability of customers. In this study during the week customers were randomly assigned to either a control group (who listened to the usual beeps while waiting for the operator's response) or to an experimental group (who listened to the classical music while waiting for the operator's response) . The operators during the conversation evaluated the level of irritability of the client as low, medium, and high. The company used these data to determine if there was evidence to support the claim that the mean level of irritability is higher for customers who listened to the classical music while waiting for the operator's response. For the study, answer the four key questions:

A) Q: EstimationS: Experiment dataT: One variable, categoricalN: Two treatments
B) Q: Hypothesis testingS: Sample dataT: One variable, numericalN: One sample
C) Q: Hypothesis testing S: Experiment data
T: One variable, numerical
N: One sample
D) Q: Estimation S: Sample data
T: One variable, categorical
N: Two samples
E) Q: Hypothesis testing S: Experiment data
T: One variable, categorical
N: Two treatments