Estimate the variance in mean mathematics SAT scores by state, using the randomly selected scores listed below. Estimate with 99% confidence. Assume the variable is normally distributed. Round the sample variance and final answers to one decimal place. 502 565 500 469 550 209 543 490 572 515 211

Estimate the variance in mean mathematics SAT scores by state, using the randomly selected scores listed below. Estimate with 99% confidence. Assume the variable is normally distributed. Round the sample variance and final answers to one decimal place. 502 565 500 469 550 209 543 490 572 515 211

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 14PPS

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Question

Estimate the variance in mean mathematics SAT scores by state, using the randomly selected scores listed below. Estimate with

99%

confidence. Assume the variable is normally distributed. Round the sample variance and final answers to one decimal place.

502	565	500	469	550	209
543	490	572	515	211

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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