Tompkins Associates reports that the mean clear height for a Class A warehouse in the United States is 22 feet. Suppose clear heights are normally distributed and that the standard deviation is 4 feet. A Class A warehouse in the United States is randomly selected. (a) What is the probability that the clear height is greater […]
the question is “The t value for a 95% confidence interval esitmate with 24 degrees of freedom is ? the answer is 2.064 but why? or rather why do i stay in 24 degrees and not 23 ??/
The mean of a population is 77 and the standard deviation is 13. The shape of the population is unknown. Determine the probability of each of the following occurring from this population.Appendix A Statistical Tables
A distribution of numbers is approximately bell shaped. If the mean of the numbers is 128 and the standard deviation is 14, a. between what two numbers would approximately 68% of the values fall? between and b. Between what two numbers would 95% of the values fall? between and c. Between what two values would 99.7% of the values fall? between […]
The US mint is assessing its process capability for minting quarters. In regard to weight, the upper specification is 5.68 grams and the lower specification is 5.66 grams. The process is centered at the specification mean of 5.67 grams with a width of 0.005 grams. What are: A) Specification width? B)The upper control limit? C)lower […]
The times for three runners is 66.08, 68.58, and 77.10. Suppose a random sample of two of these times is selected with replacement. If needed, you may assume order does matter. (i) Construct the sampling distribution of the minimum time. (ii) Construct the sampling distribution of the total time.
Looking for assistance with the formula for the below question. I thought it would be σ/(n)^(μ) with the answer of 36/5 =7.2. But received an incorrect answer. Please explain. Given μ=50, σ=36, and n=25, compute the standard error of the mean.
Explain the concept of a sampling distribution. Identify three characteristics of the sampling distribution of the sample mean.
Attach file is the first part Use the same business problem/opportunity and research variable you wrote about in Week 3. Note: Do not actually collect any data; think hypothetically. Develop a 1,050-word report in which you: Identify which types of descriptive statistics might be best for summarizing the data, if you were to collect a sample. Analyze […]
On a given day a petrol station serves three as many men as women. Two types of petrol are available, grade A and grade B. Customers pay by check or by cash. 70% of the men and 40% of the women buy grade A petrol. of the men buying grade A petrol, 805 pay by […]
