Mathematics, 18.07.2020 01:01 nsalhady1721
As part of a study of corporate employees, the director of human resources for PNC Inc. wants to compare the distance traveled to work by employees at its office in downtown Cincinnati with the distance for those in downtown Pittsburgh. A sample of 35 Cincinnati employees showed they travel a mean of 370 miles per month. A sample of 40 Pittsburgh employees showed they travel a mean of 380 miles per month. The population standard deviations for the Cincinnati and Pittsburgh employees are 30 and 26 miles, respectively. At the .05 significance level, is there a difference in the mean number of miles traveled per month between Cincinnati and Pittsburgh employees?
1. Is this a one-tailed or a two-tailed test?
2. State the decision rule. (Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.)
Answers: 3
Mathematics, 21.06.2019 15:10
Two lines that do not intersect are skew. always sometimes or never
Answers: 1
Mathematics, 21.06.2019 19:00
Simplify. โ4x^2 (5x^4โ3x^2+xโ2) โ20x^6โ12x^4+8x^3โ8x^2 โ20x^6+12x^4โ4x^3+8x^2 โ20x^8+12x^4โ4x^2+8x โ20x^6+12x^4+4x^3โ8x^2
Answers: 1
Mathematics, 21.06.2019 22:10
Given: ae โ
ce ; de โ
be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that โณaeb โ
โณced, we can show that โณ โ
โณceb by. so, โ cad โ
โ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.
Answers: 1
As part of a study of corporate employees, the director of human resources for PNC Inc. wants to com...
Mathematics, 26.10.2019 20:43
Social Studies, 26.10.2019 20:43
Physics, 26.10.2019 20:43
Mathematics, 26.10.2019 20:43
Computers and Technology, 26.10.2019 20:43
History, 26.10.2019 20:43
Chemistry, 26.10.2019 20:43
Mathematics, 26.10.2019 20:43
Mathematics, 26.10.2019 20:43
Geography, 26.10.2019 20:43
Mathematics, 26.10.2019 20:43
Mathematics, 26.10.2019 20:43