Suppose IQ scores are approximately normally distributed with a mean of 100 and a standard deviation of 15. Answer the following questions. Calculated z-scores should be rounded to the nearest hundredth (two decimal places). Also, if a question asks for a percentage, then be sure to include the percent symbol (%) to avoid your answer being marked as incorrect due to this omission. What percentage of the individuals in the population have an IQ above 130? (Individuals in this category are sometimes classified as "gifted".) Enter your calculated z-score here. __________ Enter the percentage here.______________

Suppose IQ scores are approximately normally distributed with a mean of 100 and a standard deviation of 15. Answer the following questions. Calculated z-scores should be rounded to the nearest hundredth (two decimal places). Also, if a question asks for a percentage, then be sure to include the percent symbol (%) to avoid your answer being marked as incorrect due to this omission. What percentage of the individuals in the population have an IQ above 130? (Individuals in this category are sometimes classified as "gifted".) Enter your calculated z-score here. Enter the percentage here.____

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

Suppose IQ scores are approximately normally distributed with a mean of 100 and a standard deviation of 15. Answer the following questions. Calculated z-scores should be rounded to the nearest hundredth (two decimal places). Also, if a question asks for a percentage, then be sure to include the percent symbol (%) to avoid your answer being marked as incorrect due to this omission.

What percentage of the individuals in the population have an IQ above 130? (Individuals in this category are sometimes classified as "gifted".) Enter your calculated z-score here. __________ Enter the percentage here.______________

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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