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palacir999 palacir999
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6 years ago
At a local university, a sample of 49 evening students was selected in order to determine whether the average age of the evening students is significantly different from 21 . The average age of the students in the sample was 23 years. The population standard deviation is known to be 3.5 years. Determine whether or not the average age of the evening students is significantly different from 21 . Use a .1 level of significance.
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al
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#1
6 years ago
H0:  = 21
Ha:   21 z = 4; therefore, reject H0 . There is sufficient evidence at a = .1 to conclude that the average age of the evening students is significantly different from 21.
palacir999 Author
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#2
6 years ago
Excellent response
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