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1. -/2 POINTS DEVORESTAT9 7.E.507.XP. MY NOTES ASK YOUR TEACHER A triathlon...
Please show all working out and any reference to tables if used, thank you. A triathlon...
Please show all working out and any reference to tables if used,
thank you.
A triathlon consisting of swimming, cycling, and running is one of the more strenuous amateur sporting events. An article reports on a research study involving nine male triathletes. Maximum heart rate (beats/min) was recorded during performance of each of the three events. For swimming, the sample mean and sample standard deviation were 189.0 and 7.2, respectively. Assuming that the heart-rate distribution is approximately normal, construct a...
-/10 POINTS DEVORESTAT9 7.E.015. MY NOTES ASK YOUR TEACHER Determine the confidence level for each of...
-/10 POINTS DEVORESTAT9 7.E.015. MY NOTES ASK YOUR TEACHER Determine the confidence level for each of the following large-sample one-sided confidence bounds. (Round your answers to the nearest whole number.) (a) Upper bound: x + 1.04s/n % (b) Lower bound: - 2.33s/n (c) Upper bound: x + 0.52s/ You may need to use the appropriate table in the Appendix of Tables to answer this question. Need Help? Read It Watch It Talk to a Tutor -/10 POINTS DEVORESTAT9 7.E.503.XP. MY...
4. -/1 points DevoreStat9 5.E.051. My Notes Ask Your Teacher Time taken by a randomly selected...
4. -/1 points DevoreStat9 5.E.051. My Notes Ask Your Teacher Time taken by a randomly selected applicant for a mortgage to fill out a certain form has a normal distribution with mean value 8 min and standard deviation 3 min. If five individuals fill out a form on one day and six on another, what is the probability that the sample average amount of time taken on each day is at most 11 min? (Round your answer to four decimal...
5. -12 points DevoreStat9 5.E.053. My Notes Ask Your Teacher Rockwell hardness of pins of a...
5. -12 points DevoreStat9 5.E.053. My Notes Ask Your Teacher Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.5. (Round your answers to four decimal places.) (a) If the distribution is normal, what is the probability that the sample mean hardness for a random sample of 9 pins is at least 51? (b) What is the (approximate) probability that the sample mean hardness for a random...
2. -/2 points DevoreStat9 5.E.047. My Notes Ask Your Teacher Young's modulus is a quantitative measure...
2. -/2 points DevoreStat9 5.E.047. My Notes Ask Your Teacher Young's modulus is a quantitative measure of stiffness of an elastic material. Suppose that for metal sheets of a particular type, its mean value and standard deviation are 90 GPa and 2.3 GPa, respectively. Suppose the distribution is normal. (Round your answers to four decimal places.) (a) Calculate P(89 SX 91) when n = 16. (b) How likely is it that the sample mean diameter exceeds 91 when n =...
1. Previous Answers DevoreStat9 9.E.507.XP. My Notes + Ask Your Teacher It is thought that the...
1. Previous Answers DevoreStat9 9.E.507.XP. My Notes + Ask Your Teacher It is thought that the front cover and the nature of the first question on mail surveys influence the response rate. An article tested this theory by experimenting with different cover designs. One cover was plain; the other used a picture of a skydiver. The researchers speculated that the return rate would be lower for the plain cover. Cover Plain Skydiver Number Sent 207 219 Number Returned 103 109...
3. 16.66 points DevoreStat9 7.E.015. My Notes Ask Your Determine the confidence level for each of...
3. 16.66 points DevoreStat9 7.E.015. My Notes Ask Your Determine the confidence level for each of the following large-sample one-sided confidence bounds. (Round your answers to the nearest whole number.) (a) Upper bound: x 1.04s/Vn (b) Lower bound: x - 1.88s/n e) Upper bound: x + 0.52s/V/n You may need to use the appropriate table in the Appendix of Tables to answer this question. Need Help? Read It Talk to a Tutor
| Previous Answers DevoreStat9 4.E.506 XP . Ask Your Teacher 1/18 points My Notes Construct a...
| Previous Answers DevoreStat9 4.E.506 XP . Ask Your Teacher 1/18 points My Notes Construct a normal probability plot for the following sample of observations on coating thickness for low-viscosity paint 0.81 0.86 0.87 1.02 1.07 1.14 1.27 1.31 1.47 1.48 1.59 1.62 1.66 1.70 1.77 84 Determine the z percentile associated with each sample observation. (Round your answers to two decimal places.) Sample observation 0.86 0.87 1.02 1.07 1.31 0.81 1.14 1.27 8.54 21.46 8.1 19.81 percentile 0.06 Sample...
3. -11 points DevoreStat9 5.E.039. My Notes Ask Your Teacher It is known that 80% of...
3. -11 points DevoreStat9 5.E.039. My Notes Ask Your Teacher It is known that 80% of all brand A external hard drives work in a satisfactory manner throughout the warranty period (are "successes"). Suppose that n - 15 drives are randomly selected. Let X = the number of successes in the sample. The statistic xin is the sample proportion (fraction) of successes. Obtain the sampling distribution of this statistic. (Hint: One possible value xın is 0.2, corresponding to x =...
+0/4.25 points | Previous Answers DevoreStat9 7.E.035 My Notes Ask Your Teacher Silicone implant ...
+0/4.25 points | Previous Answers DevoreStat9 7.E.035 My Notes Ask Your Teacher Silicone implant augmentation rhinoplasty is used to correct congenital nose deformities. The success of the procedure depends on various biomechanical properties of the human nasal periosteum and fascia. An article reported that for a sample of 14 (newly deceased) adults, the mean failure strainwas 25.0, and the standard deviation was 3.4 (a) Assuming a normal distribution for failure strain, estimate true average strain in a way that conveys...
Please show all working out and any reference to tables if used,
thank you.
A triathlon consisting of swimming, cycling, and running is one of the more strenuous amateur sporting events. An article reports on a research study involving nine male triathletes. Maximum heart rate (beats/min) was recorded during performance of each of the three events. For swimming, the sample mean and sample standard deviation were 189.0 and 7.2, respectively. Assuming that the heart-rate distribution is approximately normal, construct a...
-/10 POINTS DEVORESTAT9 7.E.015. MY NOTES ASK YOUR TEACHER Determine the confidence level for each of the following large-sample one-sided confidence bounds. (Round your answers to the nearest whole number.) (a) Upper bound: x + 1.04s/n % (b) Lower bound: - 2.33s/n (c) Upper bound: x + 0.52s/ You may need to use the appropriate table in the Appendix of Tables to answer this question. Need Help? Read It Watch It Talk to a Tutor -/10 POINTS DEVORESTAT9 7.E.503.XP. MY...
4. -/1 points DevoreStat9 5.E.051. My Notes Ask Your Teacher Time taken by a randomly selected applicant for a mortgage to fill out a certain form has a normal distribution with mean value 8 min and standard deviation 3 min. If five individuals fill out a form on one day and six on another, what is the probability that the sample average amount of time taken on each day is at most 11 min? (Round your answer to four decimal...
5. -12 points DevoreStat9 5.E.053. My Notes Ask Your Teacher Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.5. (Round your answers to four decimal places.) (a) If the distribution is normal, what is the probability that the sample mean hardness for a random sample of 9 pins is at least 51? (b) What is the (approximate) probability that the sample mean hardness for a random...
2. -/2 points DevoreStat9 5.E.047. My Notes Ask Your Teacher Young's modulus is a quantitative measure of stiffness of an elastic material. Suppose that for metal sheets of a particular type, its mean value and standard deviation are 90 GPa and 2.3 GPa, respectively. Suppose the distribution is normal. (Round your answers to four decimal places.) (a) Calculate P(89 SX 91) when n = 16. (b) How likely is it that the sample mean diameter exceeds 91 when n =...
1. Previous Answers DevoreStat9 9.E.507.XP. My Notes + Ask Your Teacher It is thought that the front cover and the nature of the first question on mail surveys influence the response rate. An article tested this theory by experimenting with different cover designs. One cover was plain; the other used a picture of a skydiver. The researchers speculated that the return rate would be lower for the plain cover. Cover Plain Skydiver Number Sent 207 219 Number Returned 103 109...
3. 16.66 points DevoreStat9 7.E.015. My Notes Ask Your Determine the confidence level for each of the following large-sample one-sided confidence bounds. (Round your answers to the nearest whole number.) (a) Upper bound: x 1.04s/Vn (b) Lower bound: x - 1.88s/n e) Upper bound: x + 0.52s/V/n You may need to use the appropriate table in the Appendix of Tables to answer this question. Need Help? Read It Talk to a Tutor
| Previous Answers DevoreStat9 4.E.506 XP . Ask Your Teacher 1/18 points My Notes Construct a normal probability plot for the following sample of observations on coating thickness for low-viscosity paint 0.81 0.86 0.87 1.02 1.07 1.14 1.27 1.31 1.47 1.48 1.59 1.62 1.66 1.70 1.77 84 Determine the z percentile associated with each sample observation. (Round your answers to two decimal places.) Sample observation 0.86 0.87 1.02 1.07 1.31 0.81 1.14 1.27 8.54 21.46 8.1 19.81 percentile 0.06 Sample...
3. -11 points DevoreStat9 5.E.039. My Notes Ask Your Teacher It is known that 80% of all brand A external hard drives work in a satisfactory manner throughout the warranty period (are "successes"). Suppose that n - 15 drives are randomly selected. Let X = the number of successes in the sample. The statistic xin is the sample proportion (fraction) of successes. Obtain the sampling distribution of this statistic. (Hint: One possible value xın is 0.2, corresponding to x =...
+0/4.25 points | Previous Answers DevoreStat9 7.E.035 My Notes Ask Your Teacher Silicone implant augmentation rhinoplasty is used to correct congenital nose deformities. The success of the procedure depends on various biomechanical properties of the human nasal periosteum and fascia. An article reported that for a sample of 14 (newly deceased) adults, the mean failure strainwas 25.0, and the standard deviation was 3.4 (a) Assuming a normal distribution for failure strain, estimate true average strain in a way that conveys...
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