We Draw a Random Sample of Size 36 from a Population

question 74

Multiple Choice

We draw a random sample of size 36 from a population with the standard deviation 3.5.If the sample mean is 27,what is a 95% confidence interval for the population mean?

• A)[25.8567,28.1433]
• B)[26.0405,27.9595]
• C)[26.8100,27.1900]
• D)[26.8401,27.1599]

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Definitions:

Numerical Indexes

Measures or indicators that are expressed as numbers, often used to compare and analyze data.

Mean

The arithmetic average of a set of values, calculated by summing the values and then dividing by the number of values.

Distribution

In statistics, the way in which values of a variable are spread or dispersed across a set of data.

Standard Deviation

A statistical measure that quantifies the amount of variation or dispersion of a set of data values from the mean.