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

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.