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
Answers: 3
Engineering, 03.07.2019 14:10
Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned
Answers: 2
Engineering, 04.07.2019 16:10
The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.
Answers: 1
Engineering, 04.07.2019 18:10
Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.
Answers: 3
Engineering, 04.07.2019 18:10
Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.
Answers: 3
A cognitive psychologist wants to know whether memory performance of older adults differ from younge...
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