statistics and probability

4. [-/0 Points] DETAILS BBUNDERSTAT12 7.R.004 8. [-/0 Points] DETAILS BBUNDERSTAT12 7.R.008.5. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Anystate Auto Insurance Company took a random sample of 360 insurance claims paid out during a 1-year period. The average claim Sherds of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels at the Wind Mountain paid was $1540. Assume or = $238. archaeological sitet. A random sample of ceramic vessels gave the following rim diameters (in centimeters). Find a 0.90 confidence interval for the mean claim payment. (Round your answers to two decimal places.) 15.9 134 22.1 127 13.1 196 117 13.5 17.7 18.1 lower limit upper limit LOL USE SALT Find a 0.99 confidence interval for the mean claim payment. (Round your answers to two decimal places.) (a) Use a calculator with mean and sample standard deviation keys to find the sample mean x and sample standard deviation lower limit Round your answers to four decimal places.) upper limit Need Help? Read It (b) Compute a 98% confidence interval for the population mean as of rim diameters for such ceramic vessels found at the W Mountain archaeological site. (Round your answers to one decimal place.) lower limit cm upper limit 5. [-/0 Points] DETAILS BBUNDERSTAT12 7.R.005. Need Help? Read It Watch MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of students enrolled in an introductory psychology course. The 'need for closure scale" has scores ranging from 101 to 201. For the 79 students in the highest quartile of the distribution, the mean score was x 9. [-/0 Points] DETAILS BBUNDERSTAT12 7.R.009.5. = 176.70. Assume a population standard deviation of or = 8.15. These students were all classified as high on their need for closure. Assume that the 79 students represent a random sample of all students who are classified as high on their need for closure. Find a 95% confidence interval for the population mean score ( on the "need for closure scale" for all students with a high need for closure. (Round MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER your answers to two decimal places.) lower limit A research group conducted an extensive survey of 2942 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally repres upper limit response to the question, "What does success mean to you?" 1506 responded, "Personal satisfaction from doing a good job " Let p Need Help? Read It ation proportion of all wage and salaried workers who would respond the same way to the stated question. Find a 90% confidence interval for p. (Round your answers to three decimal places.) LA USE SALT lower limit 6. [-/0 Points] DETAILS BBUNDERSTAT 12 7.R.006.5. upper limit MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Need Help? Read It Watch Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of students enrolled in an introductory psychology course. The "need for closure scale" has scores ranging from 101 to 201. For the 82 students in the highest quartile of the distribution, the mean score was x - 176.50. Assume a population standard deviation of or - 7.85. These students were all classified as high on their need for closure Assume that the 82 students represent a random sample of all students who classified as high on their need for closure. How large 10. [-/0 Points] DETAILS BBUNDERSTAT12 7.R.010.5. a sample is needed if we wish to be 99% confident that the sample mean score is within 1.8 points of the population mean score for students who are high on the need for closure? (Round your answer up to the nearest whole number.) MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER LOL USE SALT A research group conducted an extensive survey of 2992 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample students u7 1534 responded, "Personal satisfaction from doing a good job " Let p t response to the question, "What does success mean to your Taste ponded Person the population proportion of all wage and salaried workers who would respond the same way to the stated question. How large a Need Help? Read It sample is needed if we wish to be 95% confident that the sample percentage of those equating success with personal satisfaction within 1.6% of the population percentage? (Hint: Use p = 0.51 as a preliminary estimate. Round your answer up to the nearest whole number.) LA USE SALT 7. [-/0 Points] DETAILS BBUNDERSTAT12 7.R.007.5. workers MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Need Help? Read It The Wind Mountain archaeological site is located in southwestern New Mexico. Wind Mountain was home to an ancient culture of prehistoric Native Americans join sainiple of excavations at Wind Mountain gave the following depths (in centimeters) from present-day surface grade to the location of significant archaeological artifactst. 85 45 120 80 75 55 65 60 11. [-/0 Points] DETAILS BBUNDERSTAT12 7.R.011.5. 90 70 75 65 68 LO USE SALT MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at an archaeological site a) Use a calculator with mean and sample standard deviation keys to find the sample mean x and sample standard deviation s. one excavation, a sample of 167 potsherds indicated that 60 were of the three-circle, red-on-white pattern. Round your answers to four decimal places.) x = LA USE SALT (b) Compute a 85% confidence interval for the mean depth ya at which archaeological artifacts from the Wind Mountain (a) Find a point estimate / for the proportion of all ceramic potsherds at this site that are of the three-circle, red-on-white pattern. (Round your answer to four decimal places.) excavation site can be found. (Round your answers to one decimal place.) awer limit upper limit ) Compute a 95% confidence interval for the population proportion p of all ceramic potsherds with this distinctive pattern ound at the site. (Round your answers to three decimal places )