A machine produces parts with lengths that are normally distributed with σ = 0.55. A sample of 14 parts has a mean length of 76.75.
(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
μ. (Give your answer correct to three decimal
places.)
(c) Find the 95% confidence interval for μ. (Give your
answer correct to three decimal places.)
Lower Limit | |
Upper Limit |
A machine produces parts with lengths that are normally distributed with σ = 0.55. A sample...
A machine produces parts with lengths that are normally distributed with σ = 0.55. A sample of 20 parts has a mean length of 76.47. (a) Give a point estimate for μ. (Give your answer correct to two decimal places.) (b) Find the 90% confidence maximum error of estimate for μ. (Give your answer correct to three decimal places.) (c) Find the 90% confidence interval for μ. (Give your answer correct to three decimal places.) Lower Limit - Upper Limit...
A machine produces parts with lengths that are normally distributed with σ = 0.6. A sample of 19 parts has a mean length of 75.28. (a) Give a point estimate for μ. (Give your answer correct to two decimal places.) (b) Find the 98% confidence maximum error of estimate for μ. (Give your answer correct to three decimal places.) (c) Find the 98% confidence interval for μ. (Give your answer correct to three decimal places.) Lower Limit Upper Limit You...
A machine produces parts with lengths that are normally distributed with σ = 0.69. A sample of 19 parts has a mean length of 76.89. (a) Give a point estimate for μ. (Give your answer correct to two decimal places.) (b) Find the 98% confidence maximum error of estimate for μ. (Give your answer correct to three decimal places.) (c) Find the 98% confidence interval for μ. (Give your answer correct to three decimal places.) Lower Limit ______ Upper Limit...
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...
Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of the lifetime of the AAA batteries it produces. A random sample of 17 AAA batteries produced by this manufacturer lasted a mean of 11 hours with a standard deviation of 2.5 hours. Find a 95% confidence interval for the population standard deviation of the lifetimes of AAA batteries produced by the manufacturer. Then complete the table below.Carry your intermediate computations to at least...
25> Consider a variable known to be Normally distributed with unknown mean μ and known standard deviation σ-10. (a) what would be the margin of error of a 95% confidence interval for the population mean based on a random sample size of 25? The multiplier for a z confidence interval with a 95% confidence level is the critical value z. 1.960. (Enter your answer rounded to three decimal places.) margin of error 25 (b) What would be the margin of...
The population of Mosquito has an unknown mean lifespan μ with standard deviation σ = 0.55 days. A) A sample of 23 mosquito has a mean lifespan of 6.5 days. Construct a 87 % confidence interval to estimate the mean lifespan μ of the mosquito population. Round to 4 decimal places.) The interval: 6.5 (Round E to 2 decimal places) The interval in traditional format: ( B) For the same sample of 23 mosquito with mean lifespan of 6 5...
Current Attempt in Progress Construct 90%, 95%, and 99% confidence intervals to estimate μ from the following data. State the point estimate. Assume the data come from a normally distributed population. 13.3 11.6 11.9 13.1 12.5 11.4 12.0 11.7 11.8 13.3 Appendix A Statistical Tables (Round the intermediate values to 4 decimal places. Round your answers to 2 decimal places.) 90% confidence interval: enter the lower limit of the 90% confidence interval ≤ μ ≤ enter the upper limit of the...
A sample of 18 observations taken from a normally distributed population produced the following data: 28.3 27.3 25.4 25.3 31.4 23.4 26.3 24.4 28.1 37.3 23.6 28.6 27.7 25.5 27.5 25.4 22.5 22.9 Round your answers to three decimal places. a. What is the point estimate of μ? x¯= b. Make a 95% confidence interval for μ. (,) c. What is the margin of error of estimate for μ in part b? E=
Suppose the preliteracy scores of three-year-old students in the United States are normally distributed. Shelia, a preschool teacher, wants to estimate the mean score on preliteracy tests for the population of three-year-olds. She draws a simple random sample of 20 students from her class of three-year-olds and records their preliteracy scores (in points). 74, 79, 83, 85, 88, 90, 94, 95, 95, 97,99, 99, 100, 103, 105, 105, 106, 107, 107, 108 Click to download the data in your preferred...