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Name: A researcher knows the scores on a creativity test are normally distri
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Description: A researcher knows the scores on a creativity test are normally distributed with u=60 and a=20. He wants to know if an art set given to children will improve scores on the creativity test. He gives a sample of n=49 children the art set and calculat

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 2BGP

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A researcher knows the scores on a creativity test are normally distributed with u=60 and a=20. He wants to know if an art set given to children will improve scores on the creativity test. He gives a sample of n=49 children the art set and calculates the sample mean (M=80) for his group of children that received the toy. He wants to evaluate if the toy resulted in significantly improves scores on creativity test. Use a p value of .05

1. What would type 1 error be in the context of this example?

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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