Problem #1 Find the corresponding one-sided and two-sided p-values for the following Zstat values Zstat = -2.45 Zstast = 1.72 Problem #2 Determine if there is a Signicant Difference in the body weights of a particular group of men. Expected Norm: Mean = 170 lbs with a Std. Dev = 40 Sample of 64 with a Sample Mean = 183 lbs Problem #3 The fasting cholesterol level of teenage boys have a Mean = 175 mg/dL with a Std. Dev = 50. A sample of 39 boys whose fathers had a heart attack reveals a Mean = 195 mg/dL. Is this expected or unusual? Problem #4 (actual data from someone I know) Over a ten-year period, the fasting cholesterol level of an individual had a Mean = 198.8 mg.dL with a Std. Dev. = 8.7. Within that time span, there was a six-month period where the primary diet was Vegan. Over that six months, the fasting cholesterol level was measured twice, and showed a Mean = 162. Was there a difference in fasting cholesterol levels while on the Vegan diet? (conduct a 1-sided test) Is there enough evidence to support a general conclusion that would hold up to a scientific review? Why or Why Not? What would you do as the next steps? Assignment #5 Hypothesis Testing 1 Find the p- use "=NORM.S.DIST(Z,TRUE) 1/2-pt Zstat = -2.45 One-Sided p-value (do you need to subtract from 1.00?) Two-Sided p-value 1/2-pt Zstat = 1.72 One-Sided p-value (do you need to subtract from 1.00?) Two-Sided p-value 2 Given: U = 170 n = 64 6 = 40 0 = 183 Conduct a 2 Example 1/2-pt Ho Ho: H = 5 Ha: Ha: u # 5 1/2-pt SEO = 6/Vn = Table B or use "=NORM.S.DIST(Z, TRUE) 1/2-pt Zstat = (0 - H )/SE = Is Zstat Positive? Y/N Do you need to subtract value in Table from 1.000? Y/N Is the test 2 Y/N Do you need to multiply by 2? Y/N 1/2-pt The p-value is: 1/2-pt What Significance Level is this? None, Marginal, Significant, Highly Significant? Conclusion: ./2-pt 3 Given: u = 175 1 = 39 6 = 50 0 = 195 Example 1/2-pt Ho 4 = Ho: H = 5 Ha: Ha: u # 5 1/2-pt SEO = 6/Vn = Table B or use "=NORM.S.DIST(Z, TRUE) 1/2-pt Zstat = (0 - H )/SE= Is Zstat Positive? Y/N Do you need to subtract value in Table from 1.000? Y/N Is the test 2 Y/N Do you need to multiply by 2? Y/N 1/2-pt The p-value is: 1/2-pt What Significance Level is this? None, Marginal, Significant, Highly Significant? Conclusion: 1/2-pt Given: H = 198.8 n= should n = 10 or 2? 6 = 8.7 0 = 162 You choose 1-sided or 2-sided Example Ho Ho: H = 5 Ha: u