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Mathematics, 19.12.2019 02:31 jujurae03
Amusic industry professional claims that the average amount of money that an average teenager spends per month on music is at least $50. based upon previous research, the population standard deviation is estimated to be $12.42. the music professional surveys 20 students and finds that the mean spending is $47.77. is there evidence that the average amount spent by students is less than $50 at a significance level of 0.10?
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