Answered: From a population that is normally…

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 13PPS

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From a population that is normally distributed, a sample of 20 elements is selected and the standard deviation of the sample is computed. For the interval estimation of μ, the proper distribution (table) to use is the

A) normal distribution

B) t distribution with 21 degrees of freedom

C) binomial distribution

D) t distribution with 19 degrees of freedom

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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