Mathematics, 18.07.2020 17:01 ghostshadow1
12. A Brinell hardness test involves measuring the diameter of the indentation made when a hardened steel ball is pressed into material under a standard test load. Suppose that the Brinell hardness is determined for each specimen in a sample of size 50, resulting in a sample mean hardness of 64.3 and a sample standard deviation of 6.0. Calculate a 99% confidence interval for the true average Brinell hardness for material specimens of this type.
Answers: 1
Mathematics, 21.06.2019 22:30, smarty5187
One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?
Answers: 1
12. A Brinell hardness test involves measuring the diameter of the indentation made when a hardened...
English, 23.09.2019 18:00
Mathematics, 23.09.2019 18:00