A researcher investigated the lateral range of motion (in degrees) for workers with andwithout a history of lower back pain (LBP). The summary statistics are given in the followingtable.Sample Sample SampleSize1317Mean91.5Std. Dev.5.5ConditionNo LBPLBP88.37.8(a) Calculate a 95% confidence interval to estimate the difference between the true meanextent of lateral range of motion for the populations of people with the two conditions.(Assume the underlying populations are normal with equal variances.)(b) Suppose that the researcher wanted to test whether or not the means were equal (using a= 0.05). She would want to test H : µ, - µ, = 0 versus H: 4 - µ, # 0. Using theconfidence interval in part (a), what would be the decision (Reject H, or Do not rejectH, )? Explain.

Solution: Given information: n1= 13 Sample size of No LBPn2= 17 Sample size of LBpx1= 91.5 Sample…

A researcher investigated the lateral range of motion (in degrees) for workers with and istory of lower back pain (LBP). The summary statistics are given in the following Sample Sample Sample Мean 91.5 88.3 Std. Dev. 5.5 Condition Size 13 No LBP LBP 17 7.8 Iculate a 95% confidence interval to estimate the difference between the true mean ent of lateral range of motion for the populations of people with the two conditions. ssume the underlying populations are normal with equal variances.) pose that the researcher wanted to test whether or not the means were equal (using a .05). She would want to test H, : 4, - H, = 0 versus H:4-4, #0. Using the fidence interval in part (a), what would be the decision (Reject Ho or Do not reject

A researcher investigated the lateral range of motion (in degrees) for workers with and istory of lower back pain (LBP). The summary statistics are given in the following Sample Sample Sample Мean 91.5 88.3 Std. Dev. 5.5 Condition Size 13 No LBP LBP 17 7.8 Iculate a 95% confidence interval to estimate the difference between the true mean ent of lateral range of motion for the populations of people with the two conditions. ssume the underlying populations are normal with equal variances.) pose that the researcher wanted to test whether or not the means were equal (using a .05). She would want to test H, : 4, - H, = 0 versus H:4-4, #0. Using the fidence interval in part (a), what would be the decision (Reject Ho or Do not reject

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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