pittstate.instructure.com The following text applies to questions 10-20. Some pe

Question

pittstate.instructure.com The following text applies to questions 10-20. Some people claim that women can experience "mother hearing." an increased sensitivity to and awareness of noises made by children. A researcher recruits women, both mothers and non-mothers, to come to a purported "sleep experiment" in which they are led to believe that they will be evaluating the comfort of different mattresses. While each woman is asleep, a child's voice is played and level of volume needed to wake the woman is recorded Based upon the data from the 14 participants, do mothers wake at a different average sound volume (in decibels) than non-mothers? Use a two-tailed test with alpha-.05 (Carefully copy the following data to a sheet of paper in order to do your calculations.) Non-Mothers Mothers 41 51 54 37 43 MacBook Air

Explanation / Answer

Question 10

SS(No- mothere) = 380

Question 11

SS(Mother) = 352

QUestion 12

s2 (non - mother) =  380/6 = 63.33

QUestion 13

s2 (mother) = 352/6 = 58.666667

QUestion 14

sM1 -M2 = sqrt [(s1 2 + s22 )/2] = sqrt(61) = 7.8102

standard error = 7.8102 * sqrt (1/7 + 1/7 ) = 4.1747

QUestion 15

t = (50 - 44)/ 4.1747 = 1.44

Non-mother Mother Error^2 (NM) Error^2(Mother) 48 48 4 16 41 55 81 121 56 51 36 49 54 34 16 100 51 37 1 49 39 43 121 1 61 40 121 16 Average 50 44 Sum 380 352

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