Question
In: Statistics and Probability
In a simple random sample of 1600 young people, 86% had earned a high school diploma....
In a simple random sample of 1600 young people, 86% had earned a high school diploma. Complete parts a through d below. a. What is the standard error for this estimate of the percentage of all young people who earned a high school diploma? .0096 nothing (Round to four decimal places as needed.) b. Find the margin of error, using a 95% confidence level, for estimating the percentage of all young people who earned a high school diploma. nothing% (Round to one decimal place as needed.) c. Report the 95% confidence interval for the percentage of all young people who earned a high school diploma. left parenthesis nothing % comma nothing % right parenthesis (Round to one decimal place as needed.) d. Suppose that in the past, 80% of all young people earned high school diplomas. Does the confidence interval you found in part c support or refute the claim that the percentage of young people who earn high school diplomas has increased? Explain. A. The interval does not support this claim. This is because 80% is not in the interval, and all values are above 80%. B. The interval supports this claim. This is because 80% is not in the interval, and all values are above 80%. C. The interval does not support this claim. This is because 80% is in the interval. D. The interval supports this claim. This is because 80% is in the interva
Solutions
orchestra answered 1 year agoRelated Solutions
The annual earnings of 25 people with a high school diploma and 16 people with an...
The annual earnings of 25 people with a high school diploma and
16 people with an associate degree are shown below. Can you
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based on level of education? Assume that population are normally
distributed and population variances are not
equal.
High school diploma
Associate degree
x1=$36,875
x2=$44,900
s1=$5475
s2=$8580
n1=25
n2=16
Identify the claim and state the null and alternative
hypothesis.
What type of statistical test should be used...
In a simple random sample of 1600 people age 20 and over in a certain country,...
In a simple random sample of 1600 people age 20 and over in a
certain country, the proportion with a certain disease was found
to be 0.110 (or 11.0%).
Complete parts (a) through (d) below.
a. What is the standard error of the estimate of the proportion
of all people in the country age 20 and over with the disease? SE
est=Answer______ (Round to four decimal places as
needed.)
b. Find the margin of error, using a 95% confidence level,...
Young School for Wee People Introduction Young School for Wee People (YSWP) had been running a...
Young School for Wee People
Introduction
Young School for Wee People (YSWP) had been running a small,
for-profit preschool program
for young children between the ages of two and four for several
decades. YSWP was one of
several privately run programs in the suburban Philadelphia area.
For each of the three age
groups (i.e., two-, three- and four-year olds), there were two
classes per day for a total of six
classes in the facility each day. The classes were held...
The heights of a simple random sample of 400 male high school sophomores in a Midwestern...
The heights of a simple random sample of 400 male high school
sophomores in a Midwestern state are measured. The sample mean is =
66.2 inches. Suppose that the heights of male high school
sophomores follow a Normal distribution with a standard deviation
of σ = 4.1 inches. What is a 95% confidence interval for µ?
A. (59.46, 72.94)
B. (58.16, 74.24)
C. (65.80, 66.60)
D. (65.86, 66.54)
A student conducts a simple random sample of students from her high school and finds that...
A student conducts a simple random sample of students from her
high school and finds that 21 out of 100 students in her sample
regularly walk to school. Give a point estimate for the proportion
of all students at her high school who regularly walk to school.
For each combination of sample size and sample proportion, find the
approximate margin of error for the 95% confidence level. (Round
the answers to three decimal places.) In a sample of 16 students,...
Young School for Wee People (YSWP) had been running a small, for-profit preschool program for young...
Young School for Wee People (YSWP) had been running a small,
for-profit preschool program for young children between the ages of
two and four for several decades. YSWP was one of several privately
run programs in the suburban Philadelphia area. For each of the
three age groups (i.e., two-, three- and four-year olds), there
were two classes per day for a total of six classes in the facility
each day. The classes were held both in the morning and in...
In a survey of 100 U.S. residents with a high school diploma as their highest educational...
In a survey of 100 U.S. residents with a high school diploma as
their highest educational degree (Group 1) had an average yearly
income was $35,621. Another 120 U.S. residents with a GED (Group 2)
had an average yearly income of $33,498. The population standard
deviation for both populations is known to be $4,310. At a 0.01
level of significance, can it be concluded that U.S. residents with
a high school diploma make significantly more than those with a
GED?...
The following is a random sample of the annual salaries of high school counselors in the...
The following is a random sample of the annual salaries of high
school counselors in the United States. Assuming that the
distribution of salaries is approximately normal, construct a 90%
confidence interval for the mean salary of high school counselors
across the United States. Round to the nearest dollar.
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$65,640
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The annual earnings for persons with high-school diploma is
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internal rate or return of earning a bachelor's degree
Suppose the scores of a certain high school diploma test follow a normal distribution in the...
Suppose the scores of a certain high school diploma test
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and standard deviation of 30.
1. About ______ percent of the students have a
score between 135 and 195.
2. About ______ percent of the students have a score between 225
and 255.
3. The middle 95% of the students have a score between
________ and ________ .
4. Recently class A just had a Math exam, but class B...
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