A Simple Random Sample of 20 Third-Grade Children from a Certain

question 82

Multiple Choice

A simple random sample of 20 third-grade children from a certain school district is selected,and each is given a test to measure his/her reading ability.You are interested in calculating a 95% confidence interval for the population mean score.In the sample,the mean score is 64 points and the standard deviation is 12 points.What is the margin of error associated with the confidence interval?

• A)2.68 points
• B)4.64 points
• C)5.62 points
• D)6.84 points

Understand the characteristics and applications of the normal distribution in analyzing security returns.

Calculate arithmetic and geometric returns for investments.

Recognize and calculate the standard deviation and variance of investment returns.

Understand the relationship between risk and the rate of return on investments.

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Definitions:

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Instruments

Tools or devices used for scientific measurement, assessment, or to carry out a specific task or experiment.

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Refers to a basic level of measurement that categorizes data into distinct groups without implying order or quantitative value.