Answered: ores on a statistics final in a large…

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 22PFA

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scores on a statistics final in a large class were normally distributed with a mean of 76 and a standard deviation of 11 Round the answers to at least two decimals.

(a) Find the 25thpercentile of the scores.

(b) Find the 63rd percentile of the scores.

(c) The instructor wants to give an A to the students whose scores were in the top 11%of the class. What is the minimum score needed to get an A?

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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