Reference no: EM131403203
Psychology of waiting in line. While waiting in a long line for service (e.g., to use an ATM or at the post office), at some point you may decide to leave the queue. The Journal of Consumer Research (November 2003) published a study of consumer behavior while waiting in a queue. A sample of n = 148 college students were asked to imagine that they were waiting in line at a post office to mail a package and that the estimated waiting time is 10 minutes or less. After a 10-minute wait, students were asked about their level of negative feelings (annoyed, anxious) on a scale of 1 (strongly disagree) to 9 (strongly agree). Before answering, however, the students were informed about how many people were ahead of them and behind them in the line. The researchers used regression to relate negative feelings score (y) to number ahead in line (x1) and number behind in line (x2).
(a) The researchers fit an interaction model to the data. Write the hypothesized equation of this model.
(b) In the words of the problem, explain what it means to say that ''x1 and x2 interact to effect y.'
(c) A t-test for the interaction β in the model resulted in a p-value greater than .25. Interpret this result
(d) From their analysis, the researchers concluded that ''the greater the number of people ahead, the higher the negative feeling score'' and ''the greater the number of people behind, the lower the negative feeling score.'' Use this information to determine the signs of β1 and β2 in the model.
|
Efficiency of a subject on a treadmill
: 1. What is the efficiency of a subject on a treadmill who puts out work at the rate of 105 W while consuming oxygen at the rate of 2.00 L/min?(Hint:If the oxygen consumption is 2.00 L/min,then the power input is 700 W.) _______________
|
|
Why a demand curve is also a curve of average revenue
: Which is primarily responsible for the firm's zero economic profits in long-run equilibrium?
|
|
Angle of the submerged portion
: A soda straw is struck into water at an angle of 36 degrees to the vertical. Looking straight down, what does the angle of the submerged portion of the straw to the vertical appear to be?
|
|
Calculate the viscosity of a fluid
: Calculate the viscosity of a fluid that would allow a pressure drop of 35 kPa over a 5 mlength of 0.75-in. stainless steel sanitary pipe if the fluid is flowing at 0.12 m3/h and has adensity of 1010 kg/m3. Assume laminar flow.
|
|
Write the hypothesized equation of given model
: The researchers fit an interaction model to the data. Write the hypothesized equation of this model.- In the words of the problem, explain what it means to say that ''x1 and x2 interact to effect y.'
|
|
What is the mirr of a project
: What is the MIRR of a project if the initial costs are $2,078,000 and the project life is estimated as 5 years? The project will produce the same after-tax cash inflows of 494,400 per year at the end of the year.
|
|
Connection of two capacitors of capacitances
: A potential difference of 300 V is applied to a series connection of two capacitors of capacitances C1=2.00 microfarad and C2=8.00 microfarad. Suppose that the charged capacitors are then disconnected from each other and from the battery.
|
|
What is the appropriate cost for retained earnings
: The firm's beta is 1.45. The rate on six-month T-bills is 3.31%, and the return on the S&P 500 index is 7.81%. What is the appropriate cost for retained earnings in determining the firm's cost of capital?
|
|
Give a practical interpretation of r
: The researchers concluded that there is ‘‘significant negative correlation'' between the number of online courses and weekly quiz grade. Do you agree?
|