Ruth read a report that the national weekly spending average for
teens in the age group...
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Ruth read a report that the national weekly spending average forteens in the age group 12-15 years is $42. She took a random sampleof 60 teens and found that they spent an average of $35 per weekwith a standard deviation of $ 7.50. Test the claim that teens fromthis area spend less than the national average. Use a 5%significance level.
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SolutionGiven the hypothesisH0 42 null hypothesisH1 42 alternative
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