lecture(12.11A): 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...

lecture(12.11A):

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.