d homework Saved CRA CDs Inc. wants the mean lengths of the "cuts" on a CD...
CRA CDs Inc. wants the mean lengths of the “cuts” on a CD to be 140 seconds (2 minutes and 20 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute segment. Assume the distribution of the length of the cuts follows a normal distribution with a standard deviation of eleven seconds. Suppose that we select a sample of 12 cuts from various CDs sold by CRA CDs Inc. Use Appendix B.1 for...
CRA CDs Inc. wants the mean lengths of the “cuts” on a CD to be
170 seconds (2 minutes and 50 seconds). This will allow the disk
jockeys to have plenty of time for commercials within each
10-minute segment. Assume the distribution of the length of the
cuts follows a normal distribution with a standard deviation of
nine seconds. Suppose that we select a sample of 16 cuts from
various CDs sold by CRA CDs Inc. Use Appendix B.1 for...
Majesty Video Production Inc. wants the mean length of its advertisements to be 31 seconds. Assume the distribution of ad length follows the normal distribution with a population standard deviation of 2 seconds. Suppose we select a sample of 19 ads produced by Majesty a. What can we say about the shape of the distribution of the sample mean time? Answer is complete and correct. The distribution will normal be b. What is the standard error of the mean time?...
The lengths of lumber a machine cuts are normally distributed with a mean of 89 inches and a standard deviation of 0.3 inches. (a) What is the probability that a randomly selected board cut by the machine has a length greater than 89.11 inches? The probability is _____? (Round to four decimal places as needed.) (b) A sample of 42 boards is randomly selected. What is the probability that their mean length is greater than 89.11 inches? The probability is...
majesty video production inc. wants the mean length of its advertisments to be 27 seconds. assume the distribution of ad length follows the normal distribution with a population standad deviation of 2 seconds.suppose we select a sample of 16 ads produced by majesty. what can we say about the shape of the distribution of the sample mean time?what is the standard error of the mean time?(round to 2 decimal places)
Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows the normal probability distribution with a mean of 35 hours. hours and a standard deviation of 5.2 hours. As a part of its quality assurance program, Power +, Inc. tests samples of 9 batteries. a. What can you say about the shape of the distribution of the sample mean? Sample mean Normal b. What is the standard error of the distribution of...
5.4.1 Question Help A population has a mean = 141 and a standard deviation o = 28. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 40. The mean is :-), and the standard deviation is 0;=0 (Round to three decimal places as needed.) 5.4.2 Question Help A population has a meanu - 74 and a standard deviation = 8. Find the mean and standard deviation of a sampling distribution of...
t, Inc. produces AA batteries used in remote-controlled toy cars. The mean l ife of these batterles follows the normal probability distribution with a mean of 35.0 hours and a standard deviation of 5.5 hours. As a part of its quality assurance program, Power Inc. tests samples of 25 batterles. a. What can you say about the shape of the distributi of the sample mean? b. What is the standard error of the distribution of the sample mean? (Round your...
Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows a normal distribution with a mean of 38 hours and a standard deviation of 5.9 hours. As a part of its quality assurance program, Power +, Inc. tests samples of 16 batteries. a. What can you say about the shape of the distribution of the sample mean? Sample mean (Click to select)NormalUniformBinomial Round answers to four decimal places. b. What...
Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows a normal distribution with a mean of 37 hours and a standard deviation of 5.6 hours. As a part of its quality assurance program, Power +, Inc. tests samples of 16 batteries. a. What can you say about the shape of the distribution of the sample mean? Sammple mean normal (already have this answered) Round answers to four decimal places....