Question
In: Statistics and Probability
A social scientist suspects that the mean number of years of education μ for adults in...
A social scientist suspects that the mean number of years of education μ for adults in a certain large city is greater than 12 years. She surveys a random sample of 100 adults and finds that the sample mean number of years is ?̅= 12.98. Assume that the standard deviation for the number of years of education is σ = 3 years. a. Write in words what ? represents. b. State the null and alternative hypotheses. c. What is the sample evidence collected? ? = ?̅= d. Calculate the Z Test Statistic and label it on the graph. e. Is the sample mean significant? Explain. f. State your decision about the null hypothesis. g. Write your final conclusion about the alternative.
Solutions
orchestra answered 1 year agoRelated Solutions
A social scientist suspects that the mean number of years of education for all adults in...
A social scientist suspects that the mean number of years of
education for all adults in a large city is greater than 12 years.
She will test her hypothesis using a random sample of 100 adults
and finds the sample mean number of years is 12.98. Assume the
standard deviation of the number of years of education for all
adults is 3. State the appropriate null and alternative
hypotheses.
From the previous problem, find the value of the test
statistic....
1) In a 2012 the general social survey asked 847 adults how many years of education...
1) In a 2012 the general social survey asked 847
adults how many years of education they had. the sample mean was
8.55 years with a standard deviation of 8.52 years.
a) construct a 99.9% confidence interval for the mean number of
years of education. round your answers to at least two decimal
places.
a) 99.9% confidence interval for the mean number of years of
education is ---< mean <----
2) the average is 34.12 and standard deviation of
23.43....
In 2012 the General Social Survey asked 840 adults how many years of education they had....
In 2012 the General Social Survey asked 840
adults how many years of education they had. The sample mean was
8.11 years with a standard deviation of 8.91 years.
An 80% interval for the mean number of years of education. Round
the answers to two decimal places.
An 80% confidence interval for the mean number of years of
education is _< μ <_.
A recent survey asked 1244 adults how many years of education they had. The mean was...
A recent survey asked 1244 adults how many years of education
they had. The mean was 14.03 years with a standard deviation of
3.31 years
(a) Construct a 90% confidence interval for the mean number of
years of education.
(b) An earlier study suggests the mean was 13.63 in 2001. Does
your confidence interval support the claim that the mean remains
approximately the same? Why?
A social scientist would like to analyze the relationship between educational attainment (in years of higher education) and annual salary (in $1,000s).
Salary
Education
33
5
55
3
80
8
53
7
72
9
64
7
119
10
52
0
27
5
39
5
98
2
50
4
59
5
59
5
151
7
57
0
83
9
72
5
133
5
30
0
A social scientist would like to analyze the relationship
between educational attainment (in years of higher education) and
annual salary (in $1,000s). He collects data on 20 individuals. A
portion of the data is as follows:
1. Find...
A scientist has read that the mean birth weight μ of babies born at full term...
A scientist has read that the mean birth weight μ of babies born
at full term is 7.3 pounds. The scientist, believing that the mean
birth weight of babies born at full term is less than this value,
plans to perform a statistical test. She selects a random sample of
50 birth weights of babies born at full term. Suppose that the
population of birth weights of babies born at full term has a
standard deviation of 1.7 pounds and...
What does social justice mean to you in education?
What does social justice mean to you in education?
A social scientist measures the number of minutes (per day) that a small hypothetical population of...
A social scientist measures the number of minutes (per day) that
a small hypothetical population of college students spends
online.
Student
Score
Student
Score
A
87
F
99
B
75
G
31
C
93
H
87
D
96
I
93
E
58
J
84
(a) What is the range of data in this population?
min
(b) What is the IQR of data in this population?
min
(c) What is the SIQR of data in this population?
min
(d) What is...
A social scientist measures the number of minutes (per day) that a small hypothetical population of...
A social scientist measures the number of minutes (per day) that
a small hypothetical population of college students spends
student & Score
A=57 f=94
B=34 G=87
C=83 H=98
D=87 I=78
E=93 j=93
(a) What is the range of data in this population?
min
(b) What is the IQR of data in this population?
min
(c) What is the SIQR of data in this population?
min
(d) What is the population variance?
(e) What is the population standard deviation? (Round your...
A social scientist measures the number of minutes (per day) that a small hypothetical population of...
A social scientist measures the number of minutes (per day) that
a small hypothetical population of college students spends
online.
Student
Score
Student
Score
A
99
F
54
B
81
G
96
C
89
H
71
D
92
I
92
E
89
J
33
(a) What is the range of data in this population?
min
(b) What is the IQR of data in this population?
min
(c) What is the SIQR of data in this population?
min
(d)...
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