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(a) What’s the difference in height between second graders in the suburbs of your city compared…

(a) What’s the difference in height between second graders in the suburbs of your city compared…

(a) What's the difference in height between second graders in the suburbs of your city compared with second graders in the inner city? Suppose a sample of 50 second graders from the inner city gave a mean height of 92.5 ern with a standard deviation of 4.8 em and a sample of 42 second graders from the suburbs gave a mean height of 97.3 em with a standard deviation of 5.2 cm. (b) Is the observed difference in height in part (a) significant?