Ace - AI Tutor
Ask Our Educators
Textbooks
My Library
Flashcards
Scribe - AI Notes
Notes & Exams
Download App
deborah tucker

deborah t.

Divider

Questions asked

BEST MATCH

There is some evidence suggesting that you are likely to improve your test score if you rethink and change answers on a multiple-choice exam (Johnston, 1975). To examine this phenomenon, a teacher gave the same final exam to two sections of a psychology course. The students in one section were told to turn in their exams immediately after finishing, without changing any of their answers. In the other section, students were encouraged to reconsider each question and to change answers whenever they felt it was appropriate. Before the final exam, the teacher had matched 9 students in the first section with 9 students in the second section based on their midterm grades. For example, a student in the no-change section with an 89 on the midterm exam was matched with a student in the change section who also had an 89 on the midterm. The difference between the two final exam grades for each matched pair was computed, and the data showed that the students who were allowed to change answers scored higher by an average of MDD = 7 points with SS = 288. Do the data indicate a significant difference between the two conditions? Use a two-tailed test with α = .05. sMDMD= t= t-critical=± Fail to reject the null hypothesis; conclude that changing answers has a significant effect on exam performance. Fail to reject the null hypothesis; conclude that changing answers does not have a significant effect on exam performance. Reject the null hypothesis; conclude that changing answers does not have a significant effect on exam performance. Reject the null hypothesis; conclude that changing answers has a significant effect on exam performance. t Distribution Degrees of Freedom = 8 -3.0-2.0-1.00.01.02.03.0x

View Answer
 divider
BEST MATCH

Find the reference angle for -144deg . Find the reference angle for 144. : JT

View Answer
 divider
BEST MATCH

63. At the time point indicated on the ECG the _____ (A) atria and ventricles would both be relaxed (B) ventricles would be relaxed and atria would be contracting (C) atria and ventricles would both be contracting (D) atria would be relaxed and ventricles would be contracting

View Answer
 divider
BEST MATCH

100\ddot{x} + 5\dot{x} + 9x = 10\cos(5t) Initial condition: x(0)=0 and \dot{x}(0) = 0

View Answer
 divider
BEST MATCH

18. Explain why compared to chlorination, free radical bromination is more selective for a secondary position than for a primary position of an alkane. (4 pts)

View Answer
 divider
BEST MATCH

At a certain temperature the rate of this reaction is second order in $NH_3$, with a rate constant of $0.191 M^{-1}s^{-1}$: $2NH_3(g) \longrightarrow N_2(g) + 3H_2(g)$ Suppose a vessel contains $NH_3$ at a concentration of 1.11 M. Calculate how long it takes for the concentration of $NH_3$ to decrease by 76.0%. You may assume no other reaction is important. Round your answer to 2 significant digits.

View Answer
 divider
BEST MATCH

a) A fire hose with inside diameter 12.7 cm delivers water at 340 L/min. What is the speed of the water:- i) in the hose; ii) as it exits a 1.91 cm diameter nozzle. Note: 1 L/min = 1.67 x 10$^{-5}$ m³/s b) Figure shows an inverted 'T' junction which is part of a pipe system through which water flows. Water (density 1000 kg/m³) enters in through the left branch, of cross-sectional area 0.020 m², with speed 2 m/s and exits through the other two branches. The water speed through the vertical exit is 4 m/s and its cross-sectional area is 0.005 m² while the horizontal exit area is 0.010 m². Assuming inviscid incompressible flow, use the suggested control volume to carry out the following. i) Show that the exit water speed $U_2$ is 2 m/s. ii) Determine the magnitude and direction of the horizontal force experienced by the pipe junction.

View Answer
 divider
BEST MATCH

Short answer questions List those factors that will NOT shift money demand in real terms What are the major functions of money List the factors that affect autonomous consumption For the Keynesian cross model, why do we draw a 45-degree line? What is general equilibrium?

View Answer
 divider
BEST MATCH

Which of the factors of production contributes to the business by having ideas on how to combine inputs to produce a set of outputs? Select the correct answer below: Labor Capital Entrepreneurship Technology

View Answer
 divider
BEST MATCH

For a fully associative cache of a limited size, (that for eg 4 KB), what types of cache misses are possible? Select one of the following: A) Conflict misses only B) Compulsory and capacity misses C) Compulsory misses only D) Conflict and capacity misses E) Capacity misses only

View Answer
 divider