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Name: The 2019 General Social Survey asked a number of teenagers from differ
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Description: The 2019 General Social Survey asked a number of teenagers from different countries how much time they spent watching TV each day. The mean number of hours for 21 teenagers in the United States was 2.89 with a standard deviation of 2.55. In a sample

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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The 2019 General Social Survey asked a number of teenagers from different countries how much time they spent watching TV each day. The mean number of hours for 21 teenagers in the United States was 2.89 with a standard deviation of 2.55. In a sample of 45 teenagers from the United Kingdom, the sample standard deviation of daily TV time is 1.92 hours, and that the population of TV watching times is normally distributed. Can you conclude that there is a larger variety of TV watching times for teenagers in the United States is than for teenagers in the United Kingdom? Use ?= 0.01. Round to 4 decimal places.

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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