In Bay field, Ontario 65% of residents read the bay-field breeze, a local online blog. Dennis wants to know what people think of the blog, so he stops 40 people on the street to ask them if they read it. a. Verify that the normal distribution can be used to approximate this situation? b. What is the mean and standard deviation of the number of people who read the breeze? c. What is the probability that at least 25 of the people he surveys read the blog?

In Bay field, Ontario 65% of residents read the bay-field breeze, a local online blog. Dennis wants to know what people think of the blog, so he stops 40 people on the street to ask them if they read it. a. Verify that the normal distribution can be used to approximate this situation? b. What is the mean and standard deviation of the number of people who read the breeze? c. What is the probability that at least 25 of the people he surveys read the blog?

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

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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