Unit 1: Statistics Make Up Test

Instrukcije

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1

Identify the type of sample described.
You want to find out whether booth holders at a convention are pleased with their booth locations. You divide the convention center into six sections and survey every booth holder in the fifth section.
The type of sample described is a

1

Identify the method of data collection the situation describes.
A researcher places bacteria samples in two different climates. The researcher then measures the bacteria growth in each sample after 3 days.

Observational study

Survey

Simulation

Experiment

1

MODELING REAL LIFE The daily amounts of time Internet users spend on social networking platforms are normally distributed with a mean of 142 minutes and a standard deviation of 32 minutes.

1

Explain whether the research topic is best investigated through an experiment or an observational study.

A researcher wants to compare the body mass index of smokers and nonsmokers.

1

This topic is best investigated through an

observational study.

experiment.

1

Describe the design of the experiment or observational study.

Carefully select a group of individuals who have never smoked. Assign the individuals with the lowest body mass indexes to smoke and see if their body mass indexes increase during the course of the study.

Randomly choose one group of people with high body mass indexes and one with low body mass indexes. Then find the percentage of each group who do and do not smoke.

Carefully select a group of individuals who have never smoked. Randomly assign one part of the group to smoke and one part to be the control group. Then find if the smoking group has a higher body mass index after smoking.

Randomly choose one group of individuals who smoke. Then, randomly choose one group of individuals who do not smoke. Find the body mass index of the individuals in each group.

MODELING REAL LIFE A national polling company claims that 17% of U.S. public school teachers have a second job. You survey a random sample of 100 U.S. public school teachers.

1

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 32 teachers in your survey have a second job?
The claim is probably

not accurate.

accurate.

1

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 14 teachers in your survey have a second job?
The claim is probably

not accurate.

accurate.

Determine whether the data are collected from a population or a sample. Explain your reasoning.

the number of high school students in the United States

1

The data are collected from a

sample

population

1

because the data is about

an entire group.

a subset of a group.

1

Determine whether the data are collected from a population or a sample:
The color of every third car in a parking lot.
The data are collected from a

sample.

population.

1

In the United States, a survey of 1152 adults ages 18 and over found that 403 of them occasionally pretend to use their smartphones to avoid talking to someone. Identify the population and sample.

Stavka koja se može prevući		Odgovarajuća stavka
Extra Answer2		Every adult age 18 and over in the United States
Extra Answer1		The 1152 adults age 18 and over who were surveyed.
Population		403 of them occasionally pretend to use their smartphones.
Sample		A survey of people who avoid talking to someone.

A randomized comparative experiment tests whether a software update affects the user satisfaction scores of teen cell phone users. Greater scores indicate greater satisfaction. The control group has eight teenagers and the treatment group, which receives the software update, has eight teenagers. The table shows the results.

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1

You can conclude that the hypothesis is

most likely true.

most likely false.

impossible to test.

1

Determine whether the study is a randomized comparative experiment.

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1

The study is a randomized comparative experiment.

Tačno

Netačno

1

If the study was a randomized comparative experiment, describe the treatment, the treatment group, and the control group.

Stavka koja se može prevući		Odgovarajuća stavka
Extra Answer1		the milk
control group		the 75 students who chose milk
Extra Answer2		the 75 students who chose other beverages
treatment group		the other beverages
treatment		the middle school students

(ADDED BY PATEL) The mayor of Springfield is interested in finding out the average age of people in the city. He obtains a list of all the landline telephones in the city and then contacts a simple random sample of 300 people. He uses the data from the sample to estimate the average age of all the people in the city.

1

What is wrong with this survey?

1

Unit 1: Statistics Make Up Test

Identify the type of sample described.
You want to find out whether booth holders at a convention are pleased with their booth locations. You divide the convention center into six sections and survey every booth holder in the fifth section.
The type of sample described is a

Identify the method of data collection the situation describes.
A researcher places bacteria samples in two different climates. The researcher then measures the bacteria growth in each sample after 3 days.

This topic is best investigated through an

Describe the design of the experiment or observational study.

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 32 teachers in your survey have a second job?
The claim is probably

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 14 teachers in your survey have a second job?
The claim is probably

The data are collected from a

because the data is about

Determine whether the data are collected from a population or a sample:
The color of every third car in a parking lot.
The data are collected from a

In the United States, a survey of 1152 adults ages 18 and over found that 403 of them occasionally pretend to use their smartphones to avoid talking to someone. Identify the population and sample.

You can conclude that the hypothesis is

The study is a randomized comparative experiment.

If the study was a randomized comparative experiment, describe the treatment, the treatment group, and the control group.

What is wrong with this survey?

Do you think the Mayor will overestimate or underestimate the true mean age of people in Springfield? Why?

Identify the type of sample described.
You want to find out whether booth holders at a convention are pleased with their booth locations. You divide the convention center into six sections and survey every booth holder in the fifth section.
The type of sample described is a

Identify the method of data collection the situation describes.
A researcher places bacteria samples in two different climates. The researcher then measures the bacteria growth in each sample after 3 days.

This topic is best investigated through an

Describe the design of the experiment or observational study.

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 32 teachers in your survey have a second job?
The claim is probably

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 14 teachers in your survey have a second job?
The claim is probably

The data are collected from a

because the data is about

Determine whether the data are collected from a population or a sample:
The color of every third car in a parking lot.
The data are collected from a

In the United States, a survey of 1152 adults ages 18 and over found that 403 of them occasionally pretend to use their smartphones to avoid talking to someone. Identify the population and sample.

Select the double dot plot that matches the given data.

You can conclude that the hypothesis is

So, the treatment does improve satisfaction.

The study is a randomized comparative experiment.

If the study was a randomized comparative experiment, describe the treatment, the treatment group, and the control group.

What is wrong with this survey?

Do you think the Mayor will overestimate or underestimate the true mean age of people in Springfield? Why?

Select the double dot plot that matches the given data.

So, the treatment does improve satisfaction.

Unit 1: Statistics Make Up Test

Unit 1: Statistics Make Up Test

Identify the type of sample described.You want to find out whether booth holders at a convention are pleased with their booth locations. You divide the convention center into six sections and survey every booth holder in the fifth section.The type of sample described is a

Identify the method of data collection the situation describes.A researcher places bacteria samples in two different climates. The researcher then measures the bacteria growth in each sample after 3 days.

This topic is best investigated through an

Describe the design of the experiment or observational study.

What can you conclude about the accuracy of the claim that the population proportion is 0.17​ when 32​ teachers in your survey have a second job?The claim is probably

What can you conclude about the accuracy of the claim that the population proportion is 0.17​ when 14​ teachers in your survey have a second job?The claim is probably

The data are collected from a

because the data is about

Determine whether the data are collected from a population or a sample:The color of every third car in a parking lot.The data are collected from a

In the United States, a survey of 1152 adults ages 18 and over found that 403 of them occasionally pretend to use their smartphones to avoid talking to someone. Identify the population and sample.

You can conclude that the hypothesis is

The study is a randomized comparative experiment.

If the study was a randomized comparative experiment, describe the treatment, the treatment group, and the control group.

What is wrong with this survey?

Do you think the Mayor will overestimate or underestimate the true mean age of people in Springfield? Why?

Identify the type of sample described.You want to find out whether booth holders at a convention are pleased with their booth locations. You divide the convention center into six sections and survey every booth holder in the fifth section.The type of sample described is a

Identify the method of data collection the situation describes.A researcher places bacteria samples in two different climates. The researcher then measures the bacteria growth in each sample after 3 days.

This topic is best investigated through an

Describe the design of the experiment or observational study.

What can you conclude about the accuracy of the claim that the population proportion is 0.17​ when 32​ teachers in your survey have a second job?The claim is probably

What can you conclude about the accuracy of the claim that the population proportion is 0.17​ when 14​ teachers in your survey have a second job?The claim is probably

The data are collected from a

because the data is about

Determine whether the data are collected from a population or a sample:The color of every third car in a parking lot.The data are collected from a

In the United States, a survey of 1152 adults ages 18 and over found that 403 of them occasionally pretend to use their smartphones to avoid talking to someone. Identify the population and sample.

Select the double dot plot that matches the given data.

You can conclude that the hypothesis is

So, the treatment does improve satisfaction.

The study is a randomized comparative experiment.

If the study was a randomized comparative experiment, describe the treatment, the treatment group, and the control group.

What is wrong with this survey?

Do you think the Mayor will overestimate or underestimate the true mean age of people in Springfield? Why?

Select the double dot plot that matches the given data.

So, the treatment does improve satisfaction.

Identify the type of sample described.
You want to find out whether booth holders at a convention are pleased with their booth locations. You divide the convention center into six sections and survey every booth holder in the fifth section.
The type of sample described is a

Identify the method of data collection the situation describes.
A researcher places bacteria samples in two different climates. The researcher then measures the bacteria growth in each sample after 3 days.

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 32 teachers in your survey have a second job?
The claim is probably

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 14 teachers in your survey have a second job?
The claim is probably

Determine whether the data are collected from a population or a sample:
The color of every third car in a parking lot.
The data are collected from a

Identify the type of sample described.
You want to find out whether booth holders at a convention are pleased with their booth locations. You divide the convention center into six sections and survey every booth holder in the fifth section.
The type of sample described is a

Identify the method of data collection the situation describes.
A researcher places bacteria samples in two different climates. The researcher then measures the bacteria growth in each sample after 3 days.

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 32 teachers in your survey have a second job?
The claim is probably

What can you conclude about the accuracy of the claim that the population proportion is 0.17 when 14 teachers in your survey have a second job?
The claim is probably

Determine whether the data are collected from a population or a sample:
The color of every third car in a parking lot.
The data are collected from a