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There is conicting information about whether a new medication affects a person's abilin to concentrate as measured by time spent on a task You wish...

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There is conflicting information about whether a new medication affects a person's
abilin to concentrate as measured by time spent on a task You wish to test the following claim (twig) at a significance level of aFDDDSIFODOS.
For the context ufthis problem, m=ua—u1ud=u27ul where the first data set represents a
pre—tzest measure of time on task and the second data set represents a post—test measure
of time on task. W=0Hm pd=0
afiwgflfla: p114) You believe the population of difiu'mce scores is normally distributed, but you do not
know the standard deviation. You obtain the following sample ofdala: Dretest Dostite st
42.? —]..6
50.2 67.6
42.3 15.3
53.5 43.9
52 .2 53. 7 50 58.3
41 46.6
44.5 52 What is the test statistic far this sample? (Report answer accurate tn three decimal
places.) test. statistic : What is the 7 alue forthjs sample? (Report answer accurate to four decimal places.)
pvalue : The plalue is...
I (" lessthan(urequaltn)mt
- (" greater than an This test statistic leads to a decision to...
- f‘ reject the null
- (- accept the null - F failtorejectthenull As such, the final conclusion is that... - (" There is sufficient evidence to warrant rejection ofthe claim that the mean
diffflence ufpostetest from preitesl is less than D. n (- There isnrlt sufficientevidencetowarrantrejectiunaftheclajmthatthe
mean difference [If postimst from pretest is less than 0. n F The sample data support the claim that the mean diffflmce ofpnstitest from
pre—test is less than 0. . F There is not sufiicieut sample evidence In support the claimthat the mean
difl'erence nfpost—mt from pre—test is less than 0.

Top Answer

we will run a t test for paired sample as the sample tested is same before and after tests. here, the same person is tested... View the full answer

t test post.PNG

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