Researchers want to test a new hand exercise plan for arthritis patients to see if they have improvedflexibility. They recruited 110 patients with arthritis in their hands and randomly assigned them to one oftwo treatment groups: group i took their regular medicine and did the new hand exercises; and group 2only took medicine. After one month, 42 of the 55 in group 1 improved in their flexibility, and 37 of the55 in group 2 improved their flexibility.Based on the 95% confidence interval (-0.076, 0.258), is there convincing evidence of a difference inthe proportion of patients like these who would show improvement in flexibility if they did the new handexercises along with taking the medicine versus just taking the medicine?v to believe thereva difference in the proportion of patients like these who would show improvement in flexibilityif they did the new hand exercises along with taking the medicine versus just taking the medicine.Becausev contained in the interval, there is

It is given that 95% confidence interval is (-0.076, 0.258) Test is that whether there is difference…

Answered: Based on the 95% confidence interval…

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 that measured the total brain volume (TBV) (in mm³) of patients that had schizophrenia and patients that are considered normal. The first table contains the TBV of the non- schizophrenic patients and the second table contains the TBV of schizophrenia patients. Compute a 99% confidence interval for the difference in TBV of non-schizophrenic patients and patients with Schizophrenia. Prior studies say nothing about the equality of variances. Round to the nearest whole number. Total Brain Volume (in mm³) of Non-Schizophrenic Patients 1371703 1409670 1528399 1541583 1652404 1668272 1606774 1497601 1525728 1487617 1556951 1484397 1455624 1430001 1297891 1365193 1362972 1353428 1371403 1663617 1415307 1756698 1340146 1673225 1456134 1427036 1144683 1542673 1549862 1472556 1483211 1528697 1381758 1265598 Total Brain Volume (in mm³) of Schizophrenia Patients 1348795 1093447 1575546 1183986 1363837 1137626 1342077 1339149 1317181 1570744 1409139 1242976 1511787 1171081…
A study was conducted that measured the total brain volume (TBV) (in mm³) of patients that had schizophrenia and patients that are considered normal. The first table contains the TBV of the non- schizophrenic patients and the second table contains the TBV of schizophrenia patients. Compute a 95% confidence interval for the difference in TBV of non-schizophrenic patients and patients with Schizophrenia. Prior studies say nothing about the equality of variances. Round to the nearest whole number. Total Brain Volume (in mm³) of Non-Schizophrenic Patients 1493670 1505354 1642063 1269967 1520437 1581952 1550295 1549683 1338983 1422347 1492283 1195153 1396509 1478392 1485412 1618109 1459455 1717233 1357073 1576932 1417992 1548420 1484842 1595374 1679448 1569374 1370347 1389635 1396599 1533894 1565016 1340012 Total Brain Volume (in mm³) of Schizophrenia Patients 1274453 1212643 1523072 1543675 1466250 1299458 1283251 1592091 1730346 1074105 1362385 1435833 1603966 1523104 1248181 1424469…
In a trial of 350 patients who received 10-mg doses of a drug daily, 49 reported headache as a side effect. Construct a 90% confidence interval for the population proportion of patients who receive the drug and report headache as a side effect.
On Mary’s FACEBOOK page, there is a 42% chance that one of her friends will write on her wall. If she has 2400 “hits” on her page, can the probability that less than 1071 people write on her wall be modelled with a normal approximation? Explain/justify your answer.
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A study was conducted that measured the total brain volume (TBV) (in mm³) of patients that had schizophrenia and patients that are considered normal. The first table contains the TBV of the non- schizophrenic patients and the second table contains the TBV of schizophrenia patients. Compute a 99% confidence interval for the difference in TBV of non-schizophrenic patients and patients with Schizophrenia. Prior studies say nothing about the equality of variances. Round to the nearest whole number. Total Brain Volume (in mm³) of Non-Schizophrenic Patients 1487997 1611227 1527495 1409812 1297379 1400278 1724615 1249097 1309037 1546157 1352710 1620645 1446958 1540957 1535216 1303042 1363737 1318121 1460479 1602502 1353583 1292976 1558222 1474289 1541397 1373993 1398046 1282528 1516312 1567897 1532468 1381812 Total Brain Volume (in mm³) of Schizophrenia Patients 1653156 1037545 1063003 1287704 1262253 1455977 1438274 1280706 1451005 1283081 1214368 1536994 1082431 1372061 1096716 1699683…
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A study of 420,064 cell phone users found that 136 of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0343% for those not using cell phones . Use the sample data to construct 95% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.

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Based on the 95% confidence interval (–0.076, 0.258), is there convincing evidence of a difference in the proportion of patients like these who would show improvement in flexibility if they did the new hand exercises along with taking the medicine versus just taking the medicine?