THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 11

Essay

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Times spent studying by students in the week before final exams follow a normal distribution with standard deviation 9 hours.A random sample of 5 students was taken in order to estimate the mean study time for the population of all students.
-What is the probability that the sample mean differs from the population mean by ± 4.1 hours?

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Definitions:

Oil Exploration

The process of searching for underground or underwater oil reserves with the goal of drilling and extracting oil.

Standard Costs

Predetermined costs for manufacturing a product or providing a service, used as benchmarks to measure performance.

Materials Price Variance

The difference between the actual cost of materials and the expected cost at standard prices.

Variable Overhead

Refers to the costs of production that fluctuate with the level of output, such as utilities and materials, that do not have a fixed price associated with production levels.