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# Normal Probability and Z-score

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Lab technicians at a major mdical lab can process an average of 400 blood samples a day with a standard deviation of 50 samples. The processing follows a normal distribution.

Convert 445 blood samples into a z-value (standard score).
What is the area under the normal curve between 400 and 482?
What is the area under the normal curve for ratings greater than 482?

Interpret the result. What does the standard score represent? What does the area under the normal curve mean?

##### Solution Summary

The solution provides step-by-step method for the calculation of area under a normal curve using the Z score. The solution provides the meaning of normal curve and standard score. Formula for the calculation and Interpretations of the results are also included.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.