Heights of 1-Year-Olds  The average 1-year-old (both genders) is 29 inches tall. A random sample of 30

one-year-olds in a large day care franchise resulted in the following heights. At a = 0.05, can it be concluded that the average height differs from 29 inches? Assume s = 2.61.

25   32       35    25    30    26.5    26    25.5    29.5   32

30    28.5    30    32    28    31.5    29    29.5   30    34

29   32       27    28    33   28      27   32       29       29.5

Source: www.healthepic.com

8.   Salaries of Government Employees The mean salary of federal government employees on the General Schedule is $59,593. The average salary of 30 state employees who do similar work is $58,800 with

s = $1500. At the 0.01 level of significance, can it be concluded that state employees earn on average less than federal employees?

Source: New York Times Almanac.

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