Golf
a Round of Golf on Your Typical Course Requires $\alpha$

Essay

Golf
A round of golf on your typical course requires at least 4.5 hours.A particular golf club claims that the average length of time to complete a round of golf on their course is less than 4.5 hours.To test this claim,the club sampled 15 golfers and recorded their time to finish their round.The sample average was 4.4 hours with a standard deviation of 0.8 hours.Assume the time to complete a round of golf is normally distributed and use $\alpha$ = 0.01.
-A random sample of 10 observations was drawn from a large population.The data values were: 22,17,27,20,23,19,24,18,19,and 24.
A)Estimate the population mean with 90% confidence.
____________________ to ____________________
B)Test to determine if we can infer at the 5% significance level that the population mean is not equal to 20.
H₀:____________________
H₁: ____________________
Appropriate test: ____________________
Test statistic = ____________________
Conclusion: ______________________
C)What is the required condition of the techniques used in parts (a)and (b)?
D)What graphical device can you use to check to see if that required condition is satisfied?