A random sample of 30 infants (age 12 months) was selected and given a Motoric Development test. The mean score for the sample was at the 13.20 month level. The estimated standard error of the mean was 1.25. Estimate whether the mean test age of the sample could be representative of a population whose mean test age is 12 months. 113

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The Answer of A random sample of 30 infants (age 12 months) was selected and given a Motoric Development test. The mean score for the sample was at the 13.20 month level. The estimated standard error of the mean was 1.25. Estimate whether the mean test age of the sample could be representative of a population whose mean test age is 12 months. 113

A Random Sample of 30 Infants (Age 12 Months) Was