Unit 1: Statistics Make Up Test

Instructions

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.

1

A normal distribution has a mean of 33 and a standard deviation of 4. Find the probability that a randomly selected x​ -value from the distribution is at least 25.
The probability is _______ .

1

A normal distribution has a mean of 33 and a standard deviation of 4. Find the probability that a randomly selected  x​ -value from the distribution is at least 29.
The probability is _______ .

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

About what percent of Internet users spend between 78 minutes and 174 minutes on social networking platforms each day? Round your answer to the nearest tenth of a percent.
About _______ %.

1

About what percent of Internet users spend more than 238 minutes on social networking platforms each day? Round your answer to the nearest hundredth of a percent.
About _______ %.

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

1

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

1

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

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

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.

Draggable item		Corresponding Item
Population		Every adult age 18 and over in the United States
Sample		The 1152 adults age 18 and over who were surveyed.
Extra Answer1

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.

1

Find the mean of the treatment group.

_______ 

1

Determine whether the study is a randomized comparative experiment.

1

The study is a randomized comparative experiment.

1

(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 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

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

The data are collected from a

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.

The study is a randomized comparative experiment.

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?

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 14 teachers in your survey have a second job?
The claim is probably

because the data is about

Select the double dot plot that matches the given data.

You can conclude that the hypothesis is

So, the treatment does improve satisfaction.

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

Draggable item		Corresponding Item
Extra Answer2		the milk
Extra Answer1		the 75 students who chose milk
treatment group		the 75 students who chose other beverages
treatment		the other beverages
control group		the middle school students

Unit 1: Statistics Make Up Test

Unit 1: Statistics Make Up Test

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

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

The data are collected from a

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.

The study is a randomized comparative experiment.

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?

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 14​ teachers in your survey have a second job?The claim is probably

because the data is about

Select the double dot plot that matches the given data.

You can conclude that the hypothesis is

So, the treatment does improve satisfaction.

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

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

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

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