Question

Suppose that a dean of a private school wants to estimate the mean IQ of her student body without having to go through the time and expense of administering the tests to all 1,000 students. Instead, she selects 25 students at random and gives them the test. She finds that the mean for her sample is 105.

Calculate the 95% confidence interval.

Show steps please

Answer #1

The Stanford-Binet IQ test has scores that are normally
distributed with a mean of 100. A principal in an elementary school
believes that her students have above average intelligence and
wants verification of her belief. She randomly selects 20 students
and checks the student files. She finds the following IQ scores for
these 20 students. IQ scores: 110,132, 98, 97, 115, 145, 77, 130,
114, 128, 89, 101, 92, 85, 112, 79, 139, 102, 103, 89
a. Compute the sample...

An IQ test scoring is designed to have mean of 100 and a
standard deviation of 15. The scores are known to be normally
distributed. A principal at a private school wants to investigate
whether the average IQ of the students at her school is
statistically different from the designed mean. She randomly
samples from the school and has 15 students take the IQ test. The
average test score of the sample is 95 and the sample standard
deviation is...

An educational psychologist at a large university wants to
estimate the mean IQ of the students in tertiary institutes in
Macau. A random sample of 15 students (in universities in Macau)
gives the following data on IQs. From further investigation, the
data are normally distributed.
113
120
103
118
104
98
110
126
88
110
126
112
120
101
115
a. At the 5% significance level, do the data
provide sufficient evidence to conclude that the IQ of tertiary
students...

Karen wants to estimate the mean number of siblings
for each student in her school what is the sample

Suppose Diana, an educational researcher at a local university,
wants to test the impact of a new Spanish course that integrates
cultural-immersion teaching techniques with standard teaching
practices. She selects a simple random sample of 62 freshmen and
divides them into 31 pairs, matched on IQ and high school GPA. She
randomly selects one member of each pair to take the new course,
while the other member in the pair takes the traditional course.
Next, Diana records the course grade,...

1. When constructing a confidence interval to estimate a
population proportion, what affects the size of the margin of
error?
A. The sample size
B. The sample proportion
C. The confidence level
D. All of the above affect the size of the margin of error
E. None of the above affect the size of the margin of error
2. What percentage of couples meet through online dating
apps? A survey of a random sample of couples finds that 12% say...

1.) How the inventor used her IP assets in maximizing
her IP potential. What are the various IP that the inventor
employed? How did she use them?
Inventions
In 1980, the scientist created Siroca, one of her most renowned
inventions. Siroca was an instant solid fuel used for cooking (a
replacement for liquefied petroleum gas, or LPG) which was
contained in a tin. The fuel was portable and designed to ignite
into flames when its lid was opened and the...

DIRECTIONS: This is an open book, take home examination. You may
look up the answers and discuss them, if you wish. The Multiple
Choice questions will be worth 1 point each and the essay questions
will be worth 25 points each. This examination is over Chapters 6
through 9. MULTIPLE CHOICE: 1. During Piaget's concrete operational
stage, children a. are more egocentric than they were during the
preoperational period. b. often confuse appearances with reality.
c. are unable to reverse...

Which one of the following psychologists is most likely to agree
with the idea that there are "multiple intelligences" that are
independent and distinct?
A) Charles Spearman
B) Claude Steele
C) Howard Gardner
D) Sue Savage-Rumbaugh
Kyle is studying how language abilities change throughout
childhood, and Kelly is studying cognitive changes in late
adulthood. Both Kyle and Kelly are conducting studies in which area
of psychology?
A) clinical psychology
B) humanistic psychology
C) epigenetics
D) developmental psychology
REM sleep is...

Assignment: What are the main arguments in the
article?
Please answer within 5 hours. It is extremely
urgent!!!!!!!!!!!!!!!!!!!!!!!!
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BIOETHICS.
Bioethics as a field is relatively new, emerging only in the
late 1960s, though many of the questions it addresses are as old as
medicine itself. When Hippocrates wrote his now famous dictum
Primum non nocere (First, do no harm), he was grappling
with one of the core issues still facing human medicine, namely,
the role and duty of the...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 14 minutes ago

asked 19 minutes ago

asked 35 minutes ago

asked 36 minutes ago

asked 44 minutes ago

asked 48 minutes ago

asked 54 minutes ago

asked 59 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago