For the following question, use mu = 10.7, sigma = 0.2, and number of samples = 20. 19% of the samples have means as low or lower than ____
For the following question, use mu = 10.7, sigma = 0.2, and number of samples =...
For the following question, use mu = 12.4, sigma = 3.8, and number of samples = 13. What is the probability of obtaining a sample between 14.19 and 14.8?
For the following question, use mu = 6.9, sigma = 2.6, and number of samples = 3. What is the probability of obtaining a sample mean above 8.39?
For the following question, use mu = 12.8, sigma = 1.2, and number of samples = 15. What is the probability of obtaining a sample mean between the population mean and 0.4 points below the mean?
To construct a confidence interval for the difference between two population means mu 1 minus mu 2, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n 1 greater than or equals 30 and n 2 greater than or equals 30. Also, the samples must be randomly selected and independent. left parenthesis x overbar 1 minus x overbar 2 right parenthesis minus z Subscript c Baseline StartRoot StartFraction...
Question 11 Normal mu 2.09 sigma 0.21 xi P(X<=xi) 1.61 0.0111 1.76 0.0580 2.39 0.9234 2.53 0.9819 P(X<=xi) xi 0.10 1.8209 0.20 1.9133 0.30 1.9799 0.40 2.0368 Normal mu 2.09 sigma 0.24 xi P(X<=xi) 1.61 0.0228 1.76 0.0846 2.39 0.8944 2.53 0.9666 P(X<=xi) xi 0.10 1.7824 0.20 1.8880 0.30 1.9641 0.40 2.0292 The mean weight for a part made using a new production process is 2.09 pounds. Assume that a normal distribution applies and that the standard deviation is 0.24...
statistics question about smoking before 18 years of ageAccording to an almanac, 70% of adult smokers started smoking before turning 18 years oh When technology is used, use the Tech Help button for further assistance. (a) Compute the mean and standard deviation of the random variable X, the number of smokers who started before 18 in 100 trials of the probability experiment (b) Interpret the mean.(c) Would it be unusual to observe 80 smokers who started smoking before turning 18 years old...
Question 14 2 pts Researchers conducted an independent samples t-test and then reported a Cohen's d value for the test of 0.2. What is true of the two sample means? The distributions of the two sample means have a very small overlap. The two sample means are 0.2 standard deviations apart. The two samples means are not significantly different. The two samples do not likely come from the same distribution.
Question 4 [20 marks] By utilising Annexure A, answer the following questions: (a) 15 samples of n 8 have been taken from a cleaning operation. The average sample range for the 20 samples was 0.016 minute, and the average mean was 3 minutes. Determine the three-sigma control limits for this process. (4 marks) (b) 15 samples of n 10 observations have been taken from a milling process. The average sample range is 0.01 centimetres. Determine upper and lower control limits...
Suppose x has a distribution with a mean of 40 and a standard deviation of 20. Random samples of size n = 64 are drawn. (a) Describe the x bar distribution. x bar has a normal distribution. x bar has a geometric distribution. x bar has an approximately normal distribution. x bar has a Poisson distribution. x bar has an unknown distribution. x bar has a binomial distribution. Compute the mean and standard deviation of the distribution. (For each answer,...
Question Help Assume that women's heights are normally distributed with a mean given by mu equals μ=62.4 in, and a standard deviation given by sigma equals σ=2.9 in. (a) If 1 woman is randomly selected, find the probability that her height is less than 63 in. (b) If 44 women are randomly selected, find the probability that they have a mean height less than 63 in.