STAT 1.1 Review

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  ...

• average height of 63.9 inches from the sample of 45 women.
• the average height of all women aged 20 years or older.

An energy official wants to estimate the average oil output per well in the United States. From a random sample of 50 wells throughout the United States, the official obtains a sample mean of 10.7 barrels per day.
The statistic is ... 

•  the average oil output per well in the United States.
• the mean oil output of 10.7 barrels per day from the sample of 50 wells.

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.

The International Dairy Foods Association (IDFA) wants to estimate the average amount of calcium male teenagers consume. From a random sample of 50 male teenagers, the IDFA obtained a sample mean of 1081 milligrams of calcium consumed.
The parameter is ...

• the mean of 1081 milligrams of calcium from the sample of 50 teenagers.
• the average amount of calcium that male teenagers consume. The statistic

A school administrator wants to estimate the mean score on the verbal portion of the SAT for students whose first language is not English. From a simple random sample of 20 students whose first language is not English, the administrator obtains a sample mean SAT verbal score of 458.
The statistic is ...

• the mean verbal SAT score for students whose first language is not English.
• the mean SAT verbal score of 458 from the sample of 20 students.

In order to assess the opinion of students at the University of Minnesota on campus snow removal, a reporter for the student newspaper interviews the first 12 students he meets who are willing to express their opinion. In this case, the sample is

• all those students favoring prompt snow removal.
• all students at universities receiving substantial snow.
• the 12 students interviewed.
• all students at the University of Minnesota.

_______ is a part of a group being surveyed.

• Sample
• Population
• Random Sample
• Quartile

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

_______ is the entire group of objects or individuals considered for a survey.

• Sample
• Population
• Random Sample
• Quartile

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

The manager of a bookstore surveys people who buy mystery novels to see if the store should expand its hours.  What is the population?

• People who visit the bookstore.
• People who buy mystery novels.
• Residents of the town
• People who like to read.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

Portion of objects drawn from the population

• Statistics
• Population parameter
• Descriptive Statistics
• Sample