.The group of students had the test on Statistics. The following student's bloodpressure results are given in the table before and after the test:Student12345678before7782758081858175after79897779 86888379a) Find 95% confidence interval for the-difference of the student's blood pressureresults before and after the test, b) Do the data support that the blood pressure is changed atthe a=0.1? The difference is believed to be approximately normally distributed.

Answered: Image /qna-images/answer/355a5e56-9ef4-42d6-916c-b92b6e82abf3.jpg

Answered: .The group of students had the test on…

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 major oil company would like to improve its tarnished image following a large oil spill. Is marketing department develops a short television commercial and tests in on a sample of n=7 participants. People's attitudes about the company are measured with a short questionnaire, both before and after viewing the commercial. The data are as follows: Person Before After A 15 15 B 11 13 C 10 18 D 11 12 E 14 16 F 10 10 G 11 19 Test where there was a significant difference in views before and after viewing the commercial at alpha = .01. Provide each of the following in your answer. a) State the null and alternative hypotheses for this problem situation. Use correct notation. b) Compute the test statistic c) List the critical value(s) and make a decision by comparing the test statistic to the critical value(s). d) List the p-value and make a decision by comparing the p-value to alpha. e) In 1-2 complete sentences, state the conclusion of this test in the context of…
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A statistic teacher recorded the Math and Science test scores of twelve students from one section. Using 0.05 as the level of significance, is there a significant relationship between the test scores in Mathematics and Science? Student number Math Scores (X) Science Scores (Y) 1 18 20 2 16 18 3 11 12 4 15 17 5 15 15 6 11 14 7 11 12 8 13 14 9 8 10 10 9 13 11 13 12 12 7 9 What does the value of r means? a) moderate positive correlation b) perfect positive correlation c) low positive correlation d) very high positive correlation e) moderate negative correlation

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