Question

An Illinois state program evaluator is tasked with studying the intelligence of soon graduating high school...

An Illinois state program evaluator is tasked with studying the intelligence of soon graduating high school students in a number of Chicago-area high schools.

One of the specific questions that needs to be answered is, “How do the students of Collins High School, one of Chicago’s lowest-rated high schools in terms of academic achievement, fare compared to students of Lincoln Park High School, one of Chicago’s highest-rated high schools in terms of academic achievement?”.

To conduct this study, the program evaluator administers the Wechsler Adult Intelligence Scale, 4th Edition (WAIS-IV) to one 12th grade class from each high school in the Chicago area (if you are interested in learning more about the WAIS-IV, click here).

The following table shows the WAIS-IV scores for student from Collins HS and Lincoln Park HS (note: data were fabricated for purposes of this exercise):

Collins HS

Lincoln Park HS

Student

WAIS-IV Score

Student

WAIS-IV Score

1

105

1

93

2

81

2

90

3

102

3

87

4

90

4

109

5

95

5

106

6

110

6

104

7

90

7

109

8

100

8

104

9

80

9

115

10

90

10

112

11

84

11

112

12

81

12

100

13

90

13

97

14

107

14

90

15

101

15

104

16

90

16

107

17

101

Also, here is the frequency table showing the frequency of grouped WAIS-IV scores for each HS:

WAIS-IV Score

Collins HS ( f )

Lincoln Park HS ( f )

80-89

4

1

90-99

6

4

100-109

5

9

110-119

1

3

And the correct answers to the table of important computations:

MEASURE

Collins HS ( f )

Lincoln Park HS ( f )

Mean

93.50

102.35

Median

90

104

Mode

90

104

N

16

17

N-1

15

16

ΣX

1496

1740

X)2

141282

179236

ΣX2

2238016

3027600

S2X

87.88

67.17

SX

9.37

8.20

s2X

93.73

71.37

sX

9.68

8.45

Use the above information to answer the following questions (round to two decimal places where necessary):

1. What is the z-score of student 12 from Collins HS?

2. What is the raw WAIS-IV score of the student from Lincoln Park HS with a z-score of +0.61?

3. What is the z-score for student 11 at Lincoln HS? Would their z-score increase or decrease if they went to Collins HS? By how much?

4. Which student has a better WAIS-IV score relative to his/her respective peers (i.e., students from their HS): student 8 from Collins HS or student 7 from Lincoln Park HS? Why?

Homework Answers

Answer #1

(1) z-score = (81 - 93.50)/9.68 = -1.29

(2) raw score = (0.61 * 9.68) + 93.50 = 99.41

(3) z-score of student 11 at Lincoln HS = (112 - 102.35)/8.45 = 1.14
If he/she moved to Collins HS, then z-score would be = (112 - 93.50)/9.68 = 1.91
Z-score would have increased by 0.77

(4) z-score of student 8 from Collins HS = (100 - 93.50)/9.68 = 0.67
z-score of student 7 from Lincoln Park HS = (109 - 102.35)/8.45 = 0.79
Since the z-score of student 7 is higher, we can say that he/she has a better WAIS-IV score than student 8 of Collins HS.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Case Study: Freeman-Brown Private School (FBPS), based in Illinois, was founded in 1944 by the Brown...
Case Study: Freeman-Brown Private School (FBPS), based in Illinois, was founded in 1944 by the Brown and Freeman families. Over the years, the school acquired a reputation as a leading academic institution with an advanced curriculum. Parents described the school as having a highly performing academic environment that provided a rigorous curriculum while fostering a safe, family-oriented atmosphere in a place where community was valued. Not surprisingly, the student population grew and the school opened multiple campuses in the metropolitan...
A rural state wants to encourage high school graduates to continue their education and attend college....
A rural state wants to encourage high school graduates to continue their education and attend college. The state collected information on a random sample of high school seniors from across the state 7 years ago and is now observing how many years of education they completed. They believe students decide to achieve more education when they are more capable, have easier access to college education, and the opportunity cost of attending are lower. To explore the factors that affect the...
Bivariate Data & Probability After completing the calculation by hand in Q1 you can use Excel...
Bivariate Data & Probability After completing the calculation by hand in Q1 you can use Excel to check your answers before submitting. Q2 assesses your general understanding of probability and linear associations using Excel to analyse a large dataset. Question 1       Covariance and Correlation The table below shows a set of sample bivariate data. Calculate the covariance and correlation coefficient by completing the below table. Show all working. X Y (X - ) (Y - ) (X - )(Y -...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT