A golf instructor wants to datermine how effective his golf lessons are. He has

Question

A golf instructor wants to datermine how effective his golf lessons are. He has four new students record their scores in a round of golf before beginning the lessons. Alter each student received six lessons, they play another round of golf and record their scores. Assuma that golf score differences are normal. Use the output to determine if the students golf scores were reduced using0.(Note: It is better to have a lower score in golf than a higher score.) Which of the following is true? Type of Inference Sidedness Hvpothesized Difference Populations Sample Means Sample Standard Deviation of Differences Sample Size Degrees of Freedom Test Statistic P-Value Hypothesis Test Upper One-Sided Before 85.75 After 81.5 2.22 3.829 0.0157 Samples are dependent: Goif soore is quantitative and golfling before or after lessons is categorical Samples are dependent: Golf soore is categorical and golfing before or after lessons is quantitative Samples are independent: Golr score is quanlitative and golfing belre or after lessons is categorical Samples are indepenident, Galf score is calegorical and golling before or afler lessans is quantitalive QUESTION 2 Which of the toloing is not a correct way to write the hypotheses? QUESTION 3 What conclusion can you draw based on the result of the hypothesis test? Average golf scores were significantly lower after the lessons Average golf scores were lower before the lessons, but the diflerences is not significant Average golf scores were higher before the lessons, but the difference is not signifcant Average golf scores were significantly greater after the lessons.

Explanation / Answer

Question 1: Option A
Samples are dependent; Golf score is quantitative and golfing before and after lessons is categorical.

Question 2.
Option C is the incorrect way to write the hypothesis.

Question 3.
As p-value is less than the significance level of 0.05, we reject the null hypothesis.

This means average golf socres were significantly lower after lessons.

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