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Assuming that the sample is random and no non-sampling error has been made.

70 78 80 80 95

Find the sampling error.

µ= (70+78+80+80+95)/ 5

= 80.60

Now random sample of three scores from this population is taken and this sample includes the scores 70, 80, and 95. The mean for this sample is

x?= (70+80+95) /3 = 81.67

Consequently,

Sampling error= x?- µ= 81.67 – 80.60 =

20 25 13 19 9 15 11 7 17 30

Select one random sample size of five and calculate the sampling error.

µ= (20+25+13+19+9+15+11+7+17+30) /10

= 16.6

Now random sample size of five from this population is taken and this sample includes the scores 20, 9, 11, 17, and 30. The mean for this sample is

x?= (20+9+11+17+30)/ 5= 17.4

Consequently,

Sampling error= x?- µ= 17.4 – 16.6 =