Homework Answers
For 95%, z-value = 1.96
Margin of error, ME = 0.8
ME = z*sigma
sigma = ME/z
= 0.8/1.96
= 0.4082
sigma = 0.4082
Add Answer to:
11 points DevoreSta:9 4.E.042. My M The temperature eading from a thermocouple placed n a constant...
4. 0-9.09 points JKEStat11 8.E.025 The sampled population is normally distributed, with the given information. (Give...
4. 0-9.09 points JKEStat11 8.E.025 The sampled population is normally distributed, with the given information. (Give your answers correct to two decimal places.) n 19, x 29.6, and ơ 6.8 (a) Find the 0.95 confidence interval for μ. (b) Are the assumptions satisfied? Explain. to O Yes, the sampled population is normally distributed. O No, the sample distribution is not normally distributed. O not enough information You may need to use the appropriate table in Appendix B to answer this...
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...
-15 POINTS PODSTAT6 9.E.012. MY NOTES ASK YOUR TEACHER The formula used to calculate a large-sample...
-15 POINTS PODSTAT6 9.E.012. MY NOTES ASK YOUR TEACHER The formula used to calculate a large-sample confidence interval for p is Ộ + (2 critical value) (1 - ). What is the appropriate z critical value for each of the following confidence levels? (Round your answers to two decimal places.) (a) 95% (b) 90% (c) 99% (d) 80% (e) 91% You may need to use the appropriate table in the appendix or technology to answer this question. Need Help? Read...
-/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...
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...
5. -9.09 points JKEStat11 8 E 035 A machine produces parts with lengths that are normally...
5. -9.09 points JKEStat11 8 E 035 A machine produces parts with lengths that are normally distributed with ơ-0.62. A sample of 13 parts has a mean length of 76.33. (a) Give a point estimate for μ. (Give your answer correct to two decimal places.) (b Find the 95% confidence maximum error of estimate for p. (Give your answer correct to three decimal places.) (c) Find the 95% confidence interval for Lower Limit . (Give your answer correct to three...
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
please solve a and b. thanks 12. -/2 points | DEVORESTAT9 5.E.047. My Notes Young's modulus...
please solve a and b.
thanks
12. -/2 points | DEVORESTAT9 5.E.047. My Notes 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 85 GPa and 1.7 GPa, respectively. Suppose the distribution is normal. (Round your answers to four decimal places.) (a) Calculate P(84 SXS 86) when n = 16. (b) How likely is it that the sample mean diameter exceeds...
2. -/13 points DevoreStat9 7..005. Assume that the helium porosity (in percentage) of coal samples taken...
2. -/13 points DevoreStat9 7..005. Assume that the helium porosity (in percentage) of coal samples taken from any particular seam is normally distributed with true standard deviation 0.73. (a) Compute a 95% CI for the true average porosity of a certain seam if the average porosity for 22 specimens from the seam was 4.85. (Round your answers to two decimal places.) (b) Compute a 98% CI for true average porosity of another seam based on 15 specimens with a 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 =...
4. 0-9.09 points JKEStat11 8.E.025 The sampled population is normally distributed, with the given information. (Give your answers correct to two decimal places.) n 19, x 29.6, and ơ 6.8 (a) Find the 0.95 confidence interval for μ. (b) Are the assumptions satisfied? Explain. to O Yes, the sampled population is normally distributed. O No, the sample distribution is not normally distributed. O not enough information You may need to use the appropriate table in Appendix B to answer this...
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...
-15 POINTS PODSTAT6 9.E.012. MY NOTES ASK YOUR TEACHER The formula used to calculate a large-sample confidence interval for p is Ộ + (2 critical value) (1 - ). What is the appropriate z critical value for each of the following confidence levels? (Round your answers to two decimal places.) (a) 95% (b) 90% (c) 99% (d) 80% (e) 91% You may need to use the appropriate table in the appendix or technology to answer this question. Need Help? Read...
-/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...
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...
5. -9.09 points JKEStat11 8 E 035 A machine produces parts with lengths that are normally distributed with ơ-0.62. A sample of 13 parts has a mean length of 76.33. (a) Give a point estimate for μ. (Give your answer correct to two decimal places.) (b Find the 95% confidence maximum error of estimate for p. (Give your answer correct to three decimal places.) (c) Find the 95% confidence interval for Lower Limit . (Give your answer correct to three...
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
please solve a and b.
thanks
12. -/2 points | DEVORESTAT9 5.E.047. My Notes 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 85 GPa and 1.7 GPa, respectively. Suppose the distribution is normal. (Round your answers to four decimal places.) (a) Calculate P(84 SXS 86) when n = 16. (b) How likely is it that the sample mean diameter exceeds...
2. -/13 points DevoreStat9 7..005. Assume that the helium porosity (in percentage) of coal samples taken from any particular seam is normally distributed with true standard deviation 0.73. (a) Compute a 95% CI for the true average porosity of a certain seam if the average porosity for 22 specimens from the seam was 4.85. (Round your answers to two decimal places.) (b) Compute a 98% CI for true average porosity of another seam based on 15 specimens with a 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 =...
Most questions answered within 3 hours.
-
a student was diagnosed with myopia (nearshightedness). He can
comfortably read a newspaper when it is...
asked 18 minutes ago -
What is the significance of the constraints in a physical model?
What part do distinct constraints...
asked 37 minutes ago -
Consider a 3m x 3m window in a house. The thermal conductivity
is reported to be...
asked 55 minutes ago -
Why has California been the favorite destination of large number
of secondary migrants?
asked 1 hour ago -
Do not neglect the old for the new. The existing business must
not lose priority simply...
asked 4 hours ago -
Kylie is a single mom with two dependent children,
Tanner, age 7 and Olivia, age 11....
asked 5 hours ago -
Phosphorous + bromine = phosphorous tribromide. If 35.0 g of
bromine are reacted and 27.9 grams...
asked 7 hours ago -
Derive the long wavelength limit of the Planck energy density
distribution
asked 7 hours ago -
Calculate the pH of each of the following solutions.
0.50 M HBr
3.1×10−4 M KOH
4.2×10−5...
asked 10 hours ago -
For the year ended December 31, Depot Max’s cost of merchandise
sold was $85,600. Inventory at the...
asked 10 hours ago -
Week 10 - Professional Memo Assignment
Professional Memo Assignment
Your mission for this week, should you...
asked 10 hours ago -
Write a Python program that stores the data for each
player on the team, and it...
asked 10 hours ago