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Generation Y’s entitlement mentality. The current workforce is dominated by “Generation Y”—people born between 1982 and 1999. These workers have a reputation as having an entitlement mentality (e.g., they believe they have a right to a high-paying job, without the work ethic). The reasons behind this phenomenon were investigated in Proceedings of the Academy of Educational Leadership (Vol. 16, 2011). A sample of 272 undergraduate business students was administered a questionnaire designed to capture the behaviors that lead to an entitlement mentality. The responses were used to measure the following two quantitative variables for each student: entitlement score (y)—where higher scores indicate a greater level of entitlement, and “helicopter parents” score (x)—where higher scores indicate that the student’s parents had a higher level of involvement in his or her everyday experiences and problems.

a. Give the equation of a simple linear regression model relating y to x.

b. The researchers theorize that helicopter parents lead to an entitlement mentality. Based on this theory, would you expect β0 to be positive or negative (or are you unsure)? Would you expect β1 to be positive or negative (or are you unsure)? Explain.

c. The p-value for testing H0: β0 = 0 versus Ha: β1> 0 was reported as .002. Use this result to test the researchers’ entitlement theory at α = .01.

Short Answer

Expert verified
  1. y=β0+β1x
  2. Slope β1is positive.
  3. Helicopter parents positively affect the prediction of the entitlement score.

Step by step solution

01

Introduction

A straight line is the outcome of a simple linear regression study of two or more independent variables. In rare instances, a regression with numerous relevant variables might result in a curved line.

02

Providing the equation of a simple linear regression

A simple linear regression model relating y to x has the equation as

y=β0+β1x.

Here,

y = entitlement score, and

x = helicopter parent score.

03

Finding if β0 and β1 are positive or negative

According to the researcher, helicopter parenting develops an entitlement mentality. Theoretically, helicopter parenting and entitlement mentality are positively associated.

Therefore, Slope β1is positive.

04

Testing the researchers’ entitlement theory

The P-value for testing β1=0.002 at d is 0.01.If the P-value < α, the null hypothesis is rejected.

Therefore, the rejection rule says that the null hypothesis (H0) is rejected in this case.

Hence, it is possible to conclude that helicopter parents leave a positive impact on predicting the entitlement score.

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Most popular questions from this chapter

Software millionaires and birthdays. Refer to Exercise 11.23 (p. 655) and the study of software millionaires and their birthdays. The data are reproduced on p. 663.

a. Find SSE s2and s for the simple linear regression model relating the number (y) of software millionaire birthdays in a decade to the total number (x) of U.S. births.

b. Find SSE s2and s for the simple linear regression model relating the number (y) of software millionaire birthdays in a decade to the number (x) of CEO birthdays.

c. Which of the two models' fit will have smaller errors of prediction? Why?

Decade

Total U.S. Births (millions)

Number of Software Millionaire Birthdays

Number of CEO Birthdays (in a random sample of 70 companies from the Fortune 500 list)

1920

28.582

3

2

1930

24.374

1

2

1940

31.666

10

23

1950

40.530

14

38

1960

38.808

7

9

1970

33.309

4

0

Permeability of sandstone during weathering.Natural stone, such as sandstone, is a popular building construction material. An experiment was carried out to better understand the decay properties of sandstone when exposed to the weather (Geographical Analysis,Vol. 42, 2010). Blocks of sandstone were cut into 300 equal-sized slices and the slices randomly divided into three groups of 100 slices each. Slices in Group A were not exposed to any type of weathering; slices in Group B were repeatedly sprayed with a 10% salt solution (to simulate wetting by driven rain) under temperate conditions; and slices in Group C were soaked in a 10% salt solution and then dried (to simulate blocks of sandstone exposed during a wet winter and dried during a hot summer). All sandstone slices were then tested for permeability, measured in milliDarcies (mD). These permeability values measure pressure decay as a function of time. The data for the study (simulated) are saved in the STONEfile. Measures of central tendency for the permeability measurements of each sandstone group are displayed in the accompanying Minitab printout.

Descriptive Statistics: PermA, PermB, PermC

Variable

N

Mean

Median

Mode

N for Mode

PermA

100

73.62

70.45

59.9, 60, 60.1, 60.4

2

PermB

100

128.54

139.30

146.4, 146.6, 147.9, 148.3

3

PermC

100

83.07

78.65

70.9

3

The data contain atleast 5 mode value.

Only the smallest 4 are shown

a.Interpret the mean and median of the permeability measurements for Group A sandstone slices.

b.Interpret the mean and median of the permeability measurements for Group B sandstone slices.

c.Interpret the mean and median of the permeability measurements for Group C sandstone slices.

d.Interpret the mode of the permeability measurements for Group C sandstone slices.

e.The lower the permeability value, the slower the pressure decay in the sandstone over time. Which type of weathering (type B or type C) appears to result in faster decay?

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a. In this study, identify the dependent and independent variables.

b. Explain why a probabilistic model is more appropriate than a deterministic model.

c. Write the equation of the straight-line, probabilistic model.

Minitab was used to generate the following histogram:

a. Is this a frequency histogram or a relative frequency histogram? Explain.

b. How many measurement classes were used in the construction of this histogram?

c. How many measurements are in the data set described by this histogram?

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