Statistical Studies Day 1 Practice

Identify whether the numerical value is a PARAMETER or STATISTIC.

Groups:

(a) PARAMETER

,

(b) STATISTIC

• 43% said that their mother has taught them the most about managing money.

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

• 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 survey of 1503 adults in the US, 33% said they use both a landline and a cell phone.

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

• As of August 2021, 54% of the governors of the 50 states in the US are Republicans.

Identify if each data set represents a POLUATION or a SAMPLE.

Groups:

(a) POPULATION

,

(b) SAMPLE

• a survey from Dekalb requiring all teachers to fill out a poll about the district.

• a manager of a theater was asking customers at the food stand how they would rate the staff

• a quality study is being conducted on every 20th battery made at a manufacturing plant.

• every single Y-Phone’s maximum volume is measured before being packaged at a manufacturing plant

• a manager at a store asks all 23 of her employees to fill out a job satisfaction survey.

• the rates at which all of the cashiers scan products for a store on a study about the cashiers.

• a survey of just Mr. W's students in ratings on his school for a study on his school.

Decide if the scenario would be EXPERIMENTAL or OBSERVATIONAL.

Compare voter satisfaction levels between people assigned to use either paper ballots or touchscreen machines.

This represents a ​ (a)   study.

• Experimental
• Observational

Decide if the scenario would be EXPERIMENTAL or OBSERVATIONAL.

Determine which brands of orange juice people prefer. The people are randomly chosen at the supermarket and are asked to taste both brands without knowing which brand they are drinking.

This represents a ​ (a)   study.

• Experimental
• Observational

Decide if the scenario would be EXPERIMENTAL or OBSERVATIONAL.

The cafeteria manager of a high school wants to find out if high prices are keeping students from using the cafeteria. Fifty students are chosen at random to receive half-price lunch passes every day for a month. The manager then records the number of passes used. 
This represents a ​ (a)   study.

• Observational
• Experimental

Decide if the scenario would be EXPERIMENTAL or OBSERVATIONAL.

Determine if people who take vitamin C every day are less likely to get colds.

This represents a ​ (a)   study.

• Experimental
• Observational

Decide if the scenario would be EXPERIMENTAL or OBSERVATIONAL.

Compare the grades on a final math test of 25 students who use calculators and 25 students who do not use calculators. The students decide which group they are in.

This represents a ​ (a)   study.

• Experimental
• Observational

Decide if the scenario would be EXPERIMENTAL or OBSERVATIONAL.

A teacher asks her students to write down all they eat in a day and then calculate the total number of calories consumed. 

This represents a ​ (a)   study.

• Experimental
• Observational