Answered: Visual sequential memory and poor…

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 10CYU

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Visual sequential memory and poor spellers.

Holmes, Malone, and Redenbach (2008) found that good readers and good spellers correctly read 93.8±2.9 (M±SD) words from a spelling list. On the other hand, average readers and poor spellers correctly read 84.8±3.0 (M±SD) words from the same spelling list. Assuming these data are normally distributed, what percentage of participants correctly read at least 90 words in the good readers and good spellers group?

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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