Q #1

7. [0.72/1 Points] DETAILS PREVIOUS ANSWERS BBUNDERSTAT12 8.2.009.5. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A random sample of 16 values is drawn from a mound-shaped and symmetric distribution. The sample mean is 14 and the sample standard deviation is 2. Use a level of significance of 0.05 to conduct a two-tailed test of the claim that the population mean is 13.5. LA USE SALT (a) Is it appropriate to use a Student's t distribution? Explain. Yes, because the x distribution is mound-shaped and symmetric and & is unknown. No, the x distribution is skewed left. O No, the x distribution is skewed right. O No, the x distribution is not symmetric. O No, G is known. How many degrees of freedom do we use? [b) What are the hypotheses? Ho: M = 13.5; H: u = 13.5 O Hoi M = 13.5; Hil > 13.5 O Ho: M = 13.5; H: u 13.5; H: u = 13.5 O HoiM 1.75 yr; Hi: M = 1.75 yr O Hoil = 1.75 yr; Hi M > 1.75 yr O Ho:M 8 ppb; H,: u = 8 ppb Ho: ul = 8 ppb; Hj : u > 8 ppb O Ho: ul = 8 ppb; H1: u 68 O Ho: M = 68; Hi u= 68 O Ho: M # 68; Hi u = 68 O HO: M