1. [-I13 Points] DETAILS MENDSTATC4 8.E.091. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A random sample ofn = 49 observations has a mean )7 = 25.9 and a standard deviation 5 = 3.7. (a) Give the point estimate of the population mean ,u. :1 Find the 95% margin of error for your estimate. (Round your answer to four decimal places.) :] (b) Find a 90% confidence interval for p. (Round your answers to three decimal places.) :] t i: What does "90% confident" mean? 0 In repeated sampling, 90% of all intervals constructed in this manner will enclose the population mean. 0 There is a 90% chance that an individual sample mean will fall within the interval. C) There is a 1.0% chance that an individual sample mean will fall within the interval limits. 0 In repeated sampling, 10% of all intervals constructed in this manner will enclose the population mean. 0 90% of all values will fall within the interval limits. (c) Find a 90% lower condence bound for the population mean )3. (Round your answer to two decimal places.) :l Why is this bound different from the lower condence limit in part (b)? O This bound is calculated using 2.1. while the lower confidence limit in part (b) is calculated using 2,1,12- 0 This bound is calculated using n, while the lower condence limit in part (b) is calculated using VG}. O The lower bounds are based on different values of E. O This bound is calculated using Zap, while the lower condence limit in part (b) is calculated using 2,,- O This bound is calculated using , while the lower confidence limit in part (b) is calculated using n. (d) How many observations do you need to estimate p to within 0.6, with probability equal to 0.95? (Round your answer up to the nearest whole number.) :] observations You may need to use the appropriate appendix table or technology to answer this question. Need Help? _ 2. [-IS Points] DETAILS MENDSTATC4 8.E.1UO. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An experiment was conducted to estimate the effect of smoking on the blood pressure ofa group of 35 cigarette smokers. The difference for each participant was obtained by taking the difference in the blood pressure readings at the beginning of the experiment and again five years later. The sample mean increase, measured in miilimetres of mercury, was )7 = 9.8. The sample standard deviation was s = 5.9. Estimate the mean increase in blood pressure that one would expect for cigarette smokers over the time span indicated by the experiment. :1 Find the 95% margin of error. (Round your answer to two decimal places.) :1 Describe the population associated with the mean that you have estimated. 0 The population is made up of the differences in blood pressure for all smokers and nonsmokers. O The population is made up of the differences in blood pressure for all smokers between the beginning of the experiment and five years later. 0 The population is made up of the differences in blood pressure for all smokers and smokers over 40. O The population is made up of the differences in blood pressure for all smokers and nonsmokers between the beginning of the experiment and ve years later. 0 The population is made up of the differences in blood pressure for all smokers under 40 and smokers over 40