A psychology student was conducting research on self-esteem. The researcher made note of the number of positive statements the participants made about themselves. After 12 weeks of attending group counseling meetings, the researcher records the number of positive statements the participants made about themselves. Use the following data to answer the questions.| Participant | Before | After ||-------------|--------|-------|| A | 7 | 10 || B | 6 | 13 || C | 9 | 12 || D | 5 | 8 |1. What is the appropriate significance test for this type of data?2. Calculate standard error, the degrees of freedom (df), and the obtained t-value.3. What is the critical t-value?4. Is there a significant difference (alpha = .05) between the two groups if we are testing to see if the therapy leads to higher self-esteem?

The data is as follows: ParticipantBeforeAfterA710B613C912D58

Answered: A psychology student was conducting…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A study was conducted to examine the impact of speaking in public on college students. A class of 15 statistics students participated in the study. At the beginning of a lecture the students recorded their systolic blood pressure. During the lecture the instructor called on each student to stand and answer questions about topics in the lecture. After speaking the students once again recorded their blood pressure. The resulting values are given below along with summary statistics. before 107 123 128 125 136 108 130 113 105 136 146 138 108 149 132 after 141 142 146 136 144 111 132 114 103 133 140 130 100 133 113 difference -34 -19 -18 -11 -8 -3 -2 -1 2 3 6 8 8 16 19 before after difference mean 125.6 127.9 -2.267 st dev 14.53 15.45 14.03 Does this information indicate that blood pressure increased because of speaking? Conduct an appropriate hypothesis test and show appropriate steps. Let μ1 mean systolic blood pressure before speaking in public, and μ2 mean…

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