Homework Help is Here – Start Your Trial Now!
Math
Probability
Past experience indicates that the monthly long-distance telephone bill is normally distributed with a mean of 21.93 dollars and a standard deviation of 3.88 dollars. After an advertising campaign aimed at increasing long-distance telephone usage, a random sample of 25 household's bills was taken. The data (in dollars) is below. 15.65 31.01 22.6 15.13 20.04 23.06 31.04 27.37 20.54 24.42 26.85 22.52 29.12 26.87 28.1 17.01 16.95 18.41 24.48 21.83 29.27 23.34 25.59 25.94 22.31 Can we conclude at the 10% significance level that the campaign was successful? Fill in the requested information below. The value of the standardized test statistic: Note: For the next part, your answer should use interval notation. An answer of the form (-o, a) is expressed (- infty, a), an answer of the form (b, o0) is expressed (b, infty), and an answer of the form (-00, a) U (b, 0) is expressed (-infty, a)U(b, infty). The rejection region for the standardized test statistic: The p-value is

Past experience indicates that the monthly long-distance telephone bill is normally distributed with a mean of 21.93 dollars and a standard deviation of 3.88 dollars. After an advertising campaign aimed at increasing long-distance telephone usage, a random sample of 25 household's bills was taken. The data (in dollars) is below. 15.65 31.01 22.6 15.13 20.04 23.06 31.04 27.37 20.54 24.42 26.85 22.52 29.12 26.87 28.1 17.01 16.95 18.41 24.48 21.83 29.27 23.34 25.59 25.94 22.31 Can we conclude at the 10% significance level that the campaign was successful? Fill in the requested information below. The value of the standardized test statistic: Note: For the next part, your answer should use interval notation. An answer of the form (-o, a) is expressed (- infty, a), an answer of the form (b, o0) is expressed (b, infty), and an answer of the form (-00, a) U (b, 0) is expressed (-infty, a)U(b, infty). The rejection region for the standardized test statistic: The p-value is

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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
See similar textbooks
icon
Related questions
Question
Past experience indicates that the monthly long-distance telephone bill is normally distributed with a mean of 21.93 dollars and a standard deviation of 3.88 dollars. After an advertising campaign aimed at increasing long-distance telephone usage, a random sample of 25 household's bills was taken. The data (in dollars) is below. 15.65 31.01 22.6 15.13 20.04 23.06 31.04 27.37 20.54 24.42 26.85 22.52 29.12 26.87 28.1 17.01 16.95 18.41 24.48 21.83 29.27 23.34 25.59 25.94 22.31 Can we conclude at the 10% significance level that the campaign was successful? Fill in the requested information below. The value of the standardized test statistic: Note: For the next part, your answer should use interval notation. An answer of the form (-00, a) is expressed (- infty, a), an answer of the form (b, o) is expressed (b, infty), and an answer of the form (-00, a) U (b, o0) is expressed (-infty, a)U(b, infty). The rejection region for the standardized test statistic: The p-value is
Transcribed Image Text:Past experience indicates that the monthly long-distance telephone bill is normally distributed with a mean of 21.93 dollars and a standard deviation of 3.88 dollars. After an advertising campaign aimed at increasing long-distance telephone usage, a random sample of 25 household's bills was taken. The data (in dollars) is below. 15.65 31.01 22.6 15.13 20.04 23.06 31.04 27.37 20.54 24.42 26.85 22.52 29.12 26.87 28.1 17.01 16.95 18.41 24.48 21.83 29.27 23.34 25.59 25.94 22.31 Can we conclude at the 10% significance level that the campaign was successful? Fill in the requested information below. The value of the standardized test statistic: Note: For the next part, your answer should use interval notation. An answer of the form (-00, a) is expressed (- infty, a), an answer of the form (b, o) is expressed (b, infty), and an answer of the form (-00, a) U (b, o0) is expressed (-infty, a)U(b, infty). The rejection region for the standardized test statistic: The p-value is
Expert Solution
steps

Step by step

Solved in 4 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
SEE MORE TEXTBOOKS