A researcher wants to estimate the average height of women aged 20 years or older. From a simple random sample of 45 women, the researcher obtains a sample mean height of 63.9 inches. The parameter is ...

the average height of all women aged 20 years or older.

average height of 63.9 inches from the sample of 45 women.

A nutritionist wants to estimate the mean amount of sodium consumed by children under the age of 10. From a random sample of 75 children under the age of 10, the nutritionist obtains a sample mean of 2993 milligrams of sodium consumed. The statistic is ...

the mean of 2993 milligrams of sodium obtained from the sample of 75 children.

the mean amount of sodium consumed by children under the age of ten.

An education official wants to estimate the proportion of adults aged 18 or older who had read at least one book during the previous year. A random sample of 1006 adults aged 18 or older is obtained, and 835 of those adults had read at least one book during the previous year. The statistic is ...

835/1006 = 0.830, the proportion who read a book in the sample

the proportion of adults 18 or older who read a book in the previous year.

At a particular college, 78% of all students are receiving some kind of financial aid.The school newspaper selects a random sample of 100 students and 72% of the respondents say they are receiving some sort of financial aid. Which of the following is true?

78% is a parameter and 72% is a statistic

78% is a population and 72% is a sample.

72% is a population and 78% is a sample

72% is a parameter and 78% is a statistic

Why do we randomly select our samples?

so we don't get the same answers from everyone

to eliminate confounding results

Which of the following is TRUE?

In a simple random sample, all individuals and all subsets of the sample size have an equal chance of being selected.

In a multi-stage random sample, all individuals and all subsets of the sample size have an equal chance of being selected.

In a stratified random sample, all individuals and all subsets of the sample size have an equal chance of being selected.

In a cluster random sample, all individuals and all subsets of the sample size have an equal chance of being selected.

The population describes:

The group of people, objects or events being surveyed

part of the group being surveyed

Devon polled 642 drivers late on a Friday night. Is this a random sample of the drivers in the city?

No, because this only represents people late on a friday night

Yes because this represents all the drivers in the city well.

can be used to find the standard error of the mean

S x divided by the square root of n

a sample that attempts to include the entire population.

a simple random sample from the population.

a sample that does not use chance selection.

Dylan wants to know how the students at his school rate the cafeteria. He surveyed his school's basketball team to rate the school cafeteria. Is this a biased sample of the school's population?

Yes, because it is a convenience survey

No, the basketball team has the smartest students

Yes, because it's voluntary survey

No, he should have asked the football team

Stats Review 7A & 7B

Mathematics

12th Grade

CCSS covered

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MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The average annual salary for 35 of a company's 1200 accountants is $68,000.

parameter

statistic

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In a survey of a sample of high school students, 43% said that their mother has taught them the most about managing money.

parameter

statistic

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Sixty-two of the 97 passengers aboard the Hindenburg airship survived its explosion.

parameter

statistic

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In a survey of a sample of computer users, 8% said their computer had a malfunction that needed to be repaired by a service technician.

parameter

statistic

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In a recent year, the interest category for 12% of all new magazines was sports.

parameter

statistic

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In a recent survey of 1503 adults in the United States, 53% said they use both a landline and a cell phone,

parameter

statistic

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In a recent year, the average math scores for all graduates on the ACT was 21.1.

parameter

statistic

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Stats Review 7A & 7B

The average annual salary for 35 of a company's 1200 accountants is $68,000.

In a survey of a sample of high school students, 43% said that their mother has taught them the most about managing money.

Sixty-two of the 97 passengers aboard the Hindenburg airship survived its explosion.

In a survey of a sample of computer users, 8% said their computer had a malfunction that needed to be repaired by a service technician.

In a recent year, the interest category for 12% of all new magazines was sports.

In a recent survey of 1503 adults in the United States, 53% said they use both a landline and a cell phone,

In a recent year, the average math scores for all graduates on the ACT was 21.1.

A researcher wants to estimate the average height of women aged 20 years or older. From a simple random sample of 45 women, the researcher obtains a sample mean height of 63.9 inches.The parameter is ...

A nutritionist wants to estimate the mean amount of sodium consumed by children under the age of 10. From a random sample of 75 children under the age of 10, the nutritionist obtains a sample mean of 2993 milligrams of sodium consumed.The statistic is ...

An education official wants to estimate the proportion of adults aged 18 or older who had read at least one book during the previous year. A random sample of 1006 adults aged 18 or older is obtained, and 835 of those adults had read at least one book during the previous year.The statistic is ...

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Discover more resources for Mathematics

A researcher wants to estimate the average height of women aged 20 years or older. From a simple random sample of 45 women, the researcher obtains a sample mean height of 63.9 inches.
The parameter is ...

A nutritionist wants to estimate the mean amount of sodium consumed by children under the age of 10. From a random sample of 75 children under the age of 10, the nutritionist obtains a sample mean of 2993 milligrams of sodium consumed.
The statistic is ...

An education official wants to estimate the proportion of adults aged 18 or older who had read at least one book during the previous year. A random sample of 1006 adults aged 18 or older is obtained, and 835 of those adults had read at least one book during the previous year.
The statistic is ...