in crib(Cr).The researchers wanted to see if th
lecture(12.11):
Researchers were interested in the effects of co-sleeping on nightime waking and crying in infants.
.They assesed the number of minutes parents reported that their infants were awake and
crying for a period of three days. Five of the infants co-slept with thier mothers(Co) and four
infants slept in crib(Cr).The researchers wanted to see if there was a difference in the total number
of minutes of crying during the 3 nights. for the two groups. A summary of the data is given
below
Co-sleepers night time crying in minutes:
8, 4, 7, 7, 6
Crib-sleepers night time crying in minutes:
30, 17, 22, 25
Test the hypotheses at (aplha=.05) level of signifcance. using the 5 step hypotheses testing
procedure. Clealy state the null and alternative hypotheses. Round your answer to 2 decimal places.
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