AP Statistics Semester 1 Final Exam
Questions And Answers
Following a recent dramatic drop of 500 points in the Dow Jones
Industrial Average, a poll conducted for the Associated Press found
that 92% of those polled said that a year from now their family
financial situation will be as good as it is today or better. Which of
the following terms describes the number 92%? -
correct answer statistic
What is distribution of values taken by a statistic in all possible
samples of the same size from the same population called? -
correct answer the sampling distribution of the statistic
If a statistic used to estimate a parameter is such that the means of
its sampling distribution is equal to the true value of the parameter
being estimated, what is the statistic said to be? -
correct answer unbiased
According to the U.S. Census bureau, 23.5% of people in the United
States are under the age of 18. In a random sample of 250 residents
of a small town in Ohio, 28% of the sample was under 18. Which
one of the following statements is true? -
correct answer 23.5% is a parameter and 28% is a statistic
,AP Statistics Semester 1 Final Exam
Questions And Answers
There are 1200 students at Highland high school. The school
newspaper conducts a poll that asks 200 randomly selected
students how many hours of sleep they got last night. They find
that the mean hours of sleep is 6.7 hours and the standard
deviation is 2 hours. Can we estimate the standard deviation of the
sampling distribution of means by using s/sqr.rt of n=2/sqr.rt of
200=0.142 hours? -
correct answer No, because the sample is more than 10% of the
population.
Suppose you take a random sample of size 25 from a population
with mean of 120 and a standard deviation of 15. Your sample has a
mean of 115 and a standard deviation of 13.8. which of the
following has a mean of 120 and a standard deviation of 3? -
correct answer The sampling distribution of the sample mean
The central limit theorem refers to which of the following
characteristics of the sampling distribution of the sample mean? -
correct answer Regardless of the shape of the population's
distribution, the sampling distribution of the sample mean from
sufficiently large samples will be approximately Normally
distributed.
, AP Statistics Semester 1 Final Exam
Questions And Answers
A simple random sample of 1000 Americans found that 62% were
satisfied with the service provided by the dealer from which they
bought their car. A simple random sample of 1000 Canadians found
that 59% were satisfied with the service provided by the dealer
from which they bought their car. The sampling variability
associated with these statistics is -
correct answer not exactly the same, but very close
A student investigating study habits asks a simple random sample
of 16 students at her large high school how many minutes they
spent working on their english homework the previous night.
Suppose the actual parameter values for this variable are 45
minutes and 15 minutes, Which of the following best describes
what we know about the sampling distribution of means for the
student's sample? -
correct answer mew of x bar=45; standard deviation of x
bar=3.75; shape of distribution unknown
A high school teacher asks all students in her classes to fill out a
survey that asks for their age, gender, the number of years they
have lived at their current address, their favorite school subject,
and whether they pan to go to college after high school. How many
categorical and quantitate variables are being measured? -
Questions And Answers
Following a recent dramatic drop of 500 points in the Dow Jones
Industrial Average, a poll conducted for the Associated Press found
that 92% of those polled said that a year from now their family
financial situation will be as good as it is today or better. Which of
the following terms describes the number 92%? -
correct answer statistic
What is distribution of values taken by a statistic in all possible
samples of the same size from the same population called? -
correct answer the sampling distribution of the statistic
If a statistic used to estimate a parameter is such that the means of
its sampling distribution is equal to the true value of the parameter
being estimated, what is the statistic said to be? -
correct answer unbiased
According to the U.S. Census bureau, 23.5% of people in the United
States are under the age of 18. In a random sample of 250 residents
of a small town in Ohio, 28% of the sample was under 18. Which
one of the following statements is true? -
correct answer 23.5% is a parameter and 28% is a statistic
,AP Statistics Semester 1 Final Exam
Questions And Answers
There are 1200 students at Highland high school. The school
newspaper conducts a poll that asks 200 randomly selected
students how many hours of sleep they got last night. They find
that the mean hours of sleep is 6.7 hours and the standard
deviation is 2 hours. Can we estimate the standard deviation of the
sampling distribution of means by using s/sqr.rt of n=2/sqr.rt of
200=0.142 hours? -
correct answer No, because the sample is more than 10% of the
population.
Suppose you take a random sample of size 25 from a population
with mean of 120 and a standard deviation of 15. Your sample has a
mean of 115 and a standard deviation of 13.8. which of the
following has a mean of 120 and a standard deviation of 3? -
correct answer The sampling distribution of the sample mean
The central limit theorem refers to which of the following
characteristics of the sampling distribution of the sample mean? -
correct answer Regardless of the shape of the population's
distribution, the sampling distribution of the sample mean from
sufficiently large samples will be approximately Normally
distributed.
, AP Statistics Semester 1 Final Exam
Questions And Answers
A simple random sample of 1000 Americans found that 62% were
satisfied with the service provided by the dealer from which they
bought their car. A simple random sample of 1000 Canadians found
that 59% were satisfied with the service provided by the dealer
from which they bought their car. The sampling variability
associated with these statistics is -
correct answer not exactly the same, but very close
A student investigating study habits asks a simple random sample
of 16 students at her large high school how many minutes they
spent working on their english homework the previous night.
Suppose the actual parameter values for this variable are 45
minutes and 15 minutes, Which of the following best describes
what we know about the sampling distribution of means for the
student's sample? -
correct answer mew of x bar=45; standard deviation of x
bar=3.75; shape of distribution unknown
A high school teacher asks all students in her classes to fill out a
survey that asks for their age, gender, the number of years they
have lived at their current address, their favorite school subject,
and whether they pan to go to college after high school. How many
categorical and quantitate variables are being measured? -
