A population of values has a normal distribution with M=45.5 and O=80.3 You intend to draw a random sample of size n=96. A) Find the probability that a single randomly selected value is greater than 56.2. P(X > 56.2)=_______ B) Find the probability that a sample of size n=96n=96 is randomly selected with a mean greater than 56.2. P(M > 56.2) =________

A population of values has a normal distribution with M=45.5 and O=80.3 You intend to draw a random sample of size n=96. A) Find the probability that a single randomly selected value is greater than 56.2. P(X > 56.2)=_ B) Find the probability that a sample of size n=96n=96 is randomly selected with a mean greater than 56.2. P(M > 56.2) =__

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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Question

A population of values has a normal distribution with M=45.5 and O=80.3 You intend to draw a random sample of size n=96.

A) Find the probability that a single randomly selected value is greater than 56.2.
P(X > 56.2)=_______

B) Find the probability that a sample of size n=96n=96 is randomly selected with a mean greater than 56.2.
P(M > 56.2) =________

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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