Mathematics, 25.01.2020 06:31 Briannadavis03
Agrinding wheel manufacturer designed a new grinding wheel. repeated tests were conducted on wheels of approximately the same weight. the tests showed that the new wheel enables free-cutting steels to be cut on an average of 225 surface feet per minute (sfm) with a standard deviation of 16.5 sfm and that the cutting rates are approximately normally distributed. a) what is the 75th percentile of the distribution of cutting got 236.137 sfmb) what is the probability that at least 3 wheels out of 10 randomly selected wheels in the study will have a cutting rate that is greater than the cutting rate calculated in part (a)? c) what is the probability that a randomly selected sample of 5 wheels in the study will have a mean cutting rate of at least 225 sfm?
Answers: 3
Mathematics, 21.06.2019 21:30
What does independent variable and dependent variable mean in math?
Answers: 2
Mathematics, 21.06.2019 22:30
Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4
Answers: 3
Mathematics, 21.06.2019 23:00
What is the location of point g, which partitions the directed line segment from d to f into a 5: 4 ratio? –1 0 2 3
Answers: 1
Agrinding wheel manufacturer designed a new grinding wheel. repeated tests were conducted on wheels...
Spanish, 23.11.2019 05:31
Spanish, 23.11.2019 05:31