Suppose That the Amount of Time Teenagers Spend on the Internet

question 71

Essay

Suppose that the amount of time teenagers spend on the Internet is normally distributed, with a standard deviation of 1.5 hours. A sample of 100 teenagers is selected at random, and the sample mean is computed as 6.5 hours.
What happens to the width of the confidence interval estimate when each of the following things happens? a. The confidence level increases.
b. The confidence level decreases.
c. The sample size increases.
d. The sample size decreases.
e. The value of the population standard deviation increases.
f. The value of the population standard deviati on decreases.
g. The value of the sample mean increases.
h. The value of the sample mean decreases.

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Definitions:

Layoff Cost

Expenses associated with terminating employees, including severance pay and benefits continuation.

Hiring And Training Cost

The total expenses involved in recruiting new employees and providing them with the necessary training to perform their job roles effectively.

Regular Time Cost

The expense incurred from labor during normal working hours, excluding overtime or premium pay rates.

Over Time Cost

Additional expenses incurred for labor or operations that extend beyond the regular working hours, often at higher rates.