The following table shows the Myers-Briggs personality preference and area of study for a random sample of 519 college students. In the table, IN refers to introvert, intuitive; EN refers to extrovert, intuitive; IS refers to introvert, sensing; and ES refers to extrovert, sensing.
Myers-Briggs Preference |
Arts & Science | Business | Allied Health | Row Total |
IN | 61 | 8 | 27 | 96 |
EN | 83 | 38 | 33 | 154 |
IS | 52 | 31 | 32 | 115 |
ES | 79 | 44 | 31 | 154 |
Column Total | 275 | 121 | 123 | 519 |
Use a chi-square test to determine if Myers-Briggs preference type is independent of area of study at the 0.05 level of significance.
(a) What is the level of significance?
State the null and alternate hypotheses.
H0: Myers-Briggs type and area of study are
independent.
H1: Myers-Briggs type and area of study are not
independent.H0: Myers-Briggs type and area of
study are not independent.
H1: Myers-Briggs type and area of study are
independent. H0:
Myers-Briggs type and area of study are independent.
H1: Myers-Briggs type and area of study are
independent.H0: Myers-Briggs type and area of
study are not independent.
H1: Myers-Briggs type and area of study are not
independent.
(b) Find the value of the chi-square statistic for the sample.
(Round the expected frequencies to at least three decimal places.
Round the test statistic to three decimal places.)
Are all the expected frequencies greater than 5?
YesNo
What sampling distribution will you use?
Student's tbinomial chi-squarenormaluniform
What are the degrees of freedom?
(c) Find or estimate the P-value of the sample test
statistic. (Round your answer to three decimal places.)
p-value > 0.1000.050 < p-value < 0.100 0.025 < p-value < 0.0500.010 < p-value < 0.0250.005 < p-value < 0.010p-value < 0.005
(d) Based on your answers in parts (a) to (c), will you reject or
fail to reject the null hypothesis of independence?
Since the P-value > α, we fail to reject the null hypothesis.Since the P-value > α, we reject the null hypothesis. Since the P-value ≤ α, we reject the null hypothesis.Since the P-value ≤ α, we fail to reject the null hypothesis.
(e) Interpret your conclusion in the context of the
application.
At the 5% level of significance, there is sufficient evidence to conclude that Myers-Briggs type and area of study are not independent.At the 5% level of significance, there is insufficient evidence to conclude that Myers-Briggs type and area of study are not independent.
Ans:
a) level of significance=0.05
H0: Myers-Briggs type and area of study are
independent.
H1: Myers-Briggs type and area of study are not
independent.
b)
Observed(fo) | ||||
Myers-Briggs | Arts & Science | Business | Allied Health | Row Total |
Preference | ||||
IN | 61 | 8 | 27 | 96 |
EN | 83 | 38 | 33 | 154 |
IS | 52 | 31 | 32 | 115 |
ES | 79 | 44 | 31 | 154 |
Column Total | 275 | 121 | 123 | 519 |
Expected(fe) | ||||
Myers-Briggs | Arts & Science | Business | Allied Health | Row Total |
Preference | ||||
IN | 50.867 | 22.382 | 22.751 | 96 |
EN | 81.599 | 35.904 | 36.497 | 154 |
IS | 60.934 | 26.811 | 27.254 | 115 |
ES | 81.599 | 35.904 | 36.497 | 154 |
Column Total | 275 | 121 | 123 | 519 |
Chi square=(fo-fe)^2/fe | ||||
Myers-Briggs | Arts & Science | Business | Allied Health | Row Total |
Preference | ||||
IN | 2.019 | 9.241 | 0.793 | 12.053 |
EN | 0.024 | 0.122 | 0.335 | 0.482 |
IS | 1.310 | 0.654 | 0.826 | 2.791 |
ES | 0.083 | 1.826 | 0.828 | 2.736 |
Column Total | 3.435 | 11.844 | 2.783 | 18.062 |
Test statistic:
Chi square=18.062
yes
Chi square
df=(4-1)*(3-1)=6
c)p-value=CHIDIST(18.062,6)=0.0061
0.005 <p-value < 0.01
d) Since the P-value ≤ α, we reject the null hypothesis.
e)At the 5% level of significance, there is sufficient evidence to conclude that Myers-Briggs type and area of study are not independent.
The following table shows the Myers-Briggs personality preference and area of study for a random sample...
The following table shows the Myers-Briggs personality preference and area of study for a random sample of 519 college students. In the table, IN refers to introvert, intuitive; EN refers to extrovert, intuitive; IS refers to introvert, sensing; and ES refers to extrovert, sensing. Myers-Briggs Preference Arts & Science Business Allied Health Row Total IN 59 11 26 96 EN 77 45 32 154 IS 52 32 31 115 ES 78 47 29 154 Column Total 266 135 118 519...
The following table shows the Myers-Briggs personality preference and area of study for a random sample of 519 college students. In the table, IN refers to introvert, intuitive; EN refers to extrovert, intuitive; IS refers to introvert, sensing; and ES refers to extrovert, sensing. Myers-Briggs Preference Arts & Science Business Allied Health Row Total IN 66 13 17 96 EN 82 44 28 154 IS 52 37 26 115 ES 72 38 44 154 Column Total 272 132 115 519...
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