Engineering, 28.03.2021 23:00 sarah121868
A cognitive psychologist wants to know whether memory performance of older adults differ from younger adults. she randomly selects 24 elderly individuals and finds that their score on fa standardized memory test equals 553.2,. Scores on the standardized test in the population of younger adults are distributed normally with a mean equal to 497 and a standard deviation equal to 95.Is there sufficient evidence to conclude that memory performance differs between the two age groups ? Use significance level of 0.01 . State the null and alternative hypothesis for this scenario
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Engineering, 03.07.2019 15:10
If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.
Answers: 1
Engineering, 04.07.2019 18:10
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
Engineering, 04.07.2019 18:10
The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody
Answers: 2
Engineering, 04.07.2019 18:20
Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false
Answers: 3
A cognitive psychologist wants to know whether memory performance of older adults differ from younge...
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