determining if her new technique for improving players' golf scores is effective.  She takes 4 new students.  She records their score on 18 holes before taking the class and then after taking the class.  She conducts a hypothesis test.  Which type

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A golf instructor is interested in determining if her new technique for improving players' golf scores is effective.  She takes 4 new students.  She records their score on 18 holes before taking the class and then after taking the class.  She conducts a hypothesis test.  Which type of hypothesis test should she use?
 
Group of answer choices
independent sample means with population standard deviations known
single mean samples
two proportions
paired (dependent) samples
independent sample means with population standard deviations unknown
single proportion
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