A researcher was interested in comparing the number of hours of television watched each day by two-year-olds and three-year-olds.A random sample of 18 two-year-olds and 18 three-year-olds yielded the follow data. 
Find a 95% confidence interval for the difference, 
- 
,between the mean number of hours for two-year-olds and the mean number of hours for three-year-olds.
Definitions:
Frontline Employees
Workers who directly interact with customers, playing a critical role in customer service and experience.
Service Standards
The predefined levels of quality and performance in service delivery that a business commits to achieve in its customer interactions.
Customer Complaints
Expressions of dissatisfaction or grievances made by customers about a product or service.
Customer Expectations
The set of beliefs or standards that consumers hold regarding the anticipated quality and service of a product or service before purchase.
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