The authors of a paper studied a random sample of 343 Twitter users. For each Twitter user in the sample, the tweets sent during a particular time period were analyzed and the Twitter user was classified into one of the following categories based on the type of mest sually sent. Category IS OC RT ME O Description Information sharing Opinions and complaints Random thoughts Me now (what I am doing now) Other The accompanying table gives the observed counts for the five categories (approximate values read from a graph in the paper). Twitter Type IS oc RT ME 0 Observed count 51 60 62 71 Carry out a hypothesis test to determine if there is convincing evidence that the proportions of Twitter users falling into each of the five categories are not all the same. Use a significance level of 0.05. (Hint: See Example 12.2.) et P₁ P₂ P3 P4 and ps be the proportions of Twitter users falling into the five categories. State the appropriate null and alternative hypotheses. Ho: P₁ = P₂ = P3 = P4 = Ps = 0.2 H.: He is not true.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
100%

help

The authors of a paper studied a random sample of 343 Twitter users. For each Twitter user in the sample, the tweets sent during a particular time period were analyzed and the Twitter user was classified into one of the following categories based on the type of messages they
usually sent.
Category
IS
OC
RT
ME
O
Description
Information sharing
Opinions and complaints
Random thoughts
Me now (what I am doing now)
Other
The accompanying table gives the observed counts for the five categories (approximate values read from a graph in the paper).
Twitter Type IS OC RT ΜΕ 0
Observed count 51 60 62 99 71
Carry out a hypothesis test to determine if there is convincing evidence that the proportions of Twitter users falling into each of the five categories are not all the same. Use a significance level of 0.05. (Hint: See Example 12.2.)
Let P₁ P2 P3 P4, and p5 be the proportions of Twitter users falling into the five categories.
State the appropriate null and alternative hypotheses.
Ho: P₁ = P₂ = P3 P4 P5 = 0.2
H₂: Ho is not true.
| Ho: P₁ = P₂ = P3 = P4 = P5 = 343
H: Ho is not true.
O Ho: P₁ = P₂ = P3 = P4 = P5 = 70
H₂: Ho is not true.
Ho: P₁ = P₂ = P3 = P4 = P5 = 0.05
H: Ho is not true.
| Ho: P₁ = P₂ = P3 = P4 = P5 = 0.5
H: H is not true.
Calculate the test statistic. (Round your answer to two decimal places.)
x² = 20.50
X
Use technology to calculate the P-value. (Round your answer to four decimal places.)
P-value = 0.0004
Transcribed Image Text:The authors of a paper studied a random sample of 343 Twitter users. For each Twitter user in the sample, the tweets sent during a particular time period were analyzed and the Twitter user was classified into one of the following categories based on the type of messages they usually sent. Category IS OC RT ME O Description Information sharing Opinions and complaints Random thoughts Me now (what I am doing now) Other The accompanying table gives the observed counts for the five categories (approximate values read from a graph in the paper). Twitter Type IS OC RT ΜΕ 0 Observed count 51 60 62 99 71 Carry out a hypothesis test to determine if there is convincing evidence that the proportions of Twitter users falling into each of the five categories are not all the same. Use a significance level of 0.05. (Hint: See Example 12.2.) Let P₁ P2 P3 P4, and p5 be the proportions of Twitter users falling into the five categories. State the appropriate null and alternative hypotheses. Ho: P₁ = P₂ = P3 P4 P5 = 0.2 H₂: Ho is not true. | Ho: P₁ = P₂ = P3 = P4 = P5 = 343 H: Ho is not true. O Ho: P₁ = P₂ = P3 = P4 = P5 = 70 H₂: Ho is not true. Ho: P₁ = P₂ = P3 = P4 = P5 = 0.05 H: Ho is not true. | Ho: P₁ = P₂ = P3 = P4 = P5 = 0.5 H: H is not true. Calculate the test statistic. (Round your answer to two decimal places.) x² = 20.50 X Use technology to calculate the P-value. (Round your answer to four decimal places.) P-value = 0.0004
Expert Solution
steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman