Urban planners in Melbourne average 10.2 years’ experience. We
know this from a Census of urban...
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Urban planners in Melbourne average 10.2 years’ experience. Weknow this from a Census of urban planners, but the raw data waslost, so we cannot use the data to compute ?. What aninconvenience! (a) In a random sample of 65 urbanplanners in Melbourne’s growth areas, the average was 8.7 yearswith a standard deviation of 0.52. Are growth-areas plannerssignificantly less experienced than the metropolitan average?Presume alpha = 0.05 (b) The same sample of urban planners reportsan annual salary of $25,665 with s=$722. The statewide averagesalary is $23,899. Is there statistical evidence to suggest thatgrowth area planners salaries are significantly higher thanMelbourne overall? Presume alpha = 0.05
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a H0 102H1 102The test statistic t s 87 102052 2326At alpha 005 the critical value is t005 64 1669Since the test statistic value is less
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