An Educational Organization in California Is Interested in Estimating the Mean

question 23

Multiple Choice

An educational organization in California is interested in estimating the mean number of minutes per day that children between the age of 6 and 18 spend watching television per day. A previous study showed that the population standard deviation was 21.5 minutes. The organization selected a random sample of n = 200 children between the age of 6 and 18 and recorded the number of minutes of TV that each person watched on a particular day. The mean time was 191.3 minutes. If the leaders of the organization wish to develop an interval estimate with 95 percent confidence, what will the margin of error be?

• A) Approximately ±1.52 minutes
• B) About ±2.98 minutes
• C) z = 1.96
• D) Approximately ±42.14 minutes

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Definitions:

Pensions

Retirement plans that pay a fixed sum to individuals on a regular basis, typically after retirement, based on salary and years of service.

Employee Compensation

All forms of financial returns and tangible benefits that employees receive as part of their employment, including salary, bonuses, and benefits.

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Health care reform law passed in 2010 that includes incentives and penalties for employers providing health insurance as a benefit.

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A law enacted to provide for the general welfare by establishing a system of federal old-age benefits, and by enabling states to make more adequate provision for aged persons, blind persons, dependent and crippled children, maternal and child welfare, public health, and the administration of their unemployment compensation laws.