Intro to Statistics - Review #2

Identify the population of interest and the sample that is used:

A marketing research company wants to know if the new iOS has forced iPhone users to upgrade to the newest version of the iPhone because the new operating system slows down their current version. They take a SRS of 10,000 iPhone users from the registered iPhone accounts at Verizon stores across the country.

• Population: All iPhone users; Sample: 10,000 iPhone users from Verizon stores

• Population: All Verizon store customers; Sample: 10,000 iPhone users from Verizon stores

• Population: All smartphone users; Sample: 10,000 iPhone users from Verizon stores

• Population: All iPhone users with the new iOS; Sample: 10,000 iPhone users from Verizon stores

Identify the population of interest and the sample that is used:

The administration at BMHS wants to know information about the Winter Formal dance. They plan to conduct a simple random sample of 250 students as they leave the dance and ask them a series of questions about the dance.

• Population: All students at BMHS; Sample: 250 students leaving the dance

• Population: All students attending the Winter Formal dance; Sample: 250 students leaving the dance

• Population: All students who attended the previous Winter Formal Dances; Sample: 250 students leaving the dance

• Population: All students at BMHS; Sample: All students attending the Winter Formal dance

Decide whether descriptive or inferential statistics is used:

By 2040 at least 3.5 billion people will run short of water.

• Descriptive

• Inferential

Decide whether descriptive or inferential statistics is used:

In a sample of 100 individuals, 36% think that watching television is the best way to spend an evening.

• Descriptive

• Inferential

Decide whether descriptive or inferential statistics is used:

In a survey of 1000 adults, 34% said they have posted on social media platforms.

• Descriptive

• Inferential

Decide whether descriptive or inferential statistics is used:

Allergy therapy makes bees go away.

• Descriptive

• Inferential

Decide whether descriptive or inferential statistics is used:

Experts say that mortgage rates may soon hit an all time high.

• Descriptive

• Inferential

Identify the type of data:

Weights of the backpacks of first-graders on a school bus.

• Qualitative - Ordinal

• Quantitative - Discrete
• Quantitative - Continuous
• Qualitative - Nominal

Identify the type of data:

Colors of automobiles in a shopping center parking lot.

• Qualitative - Nominal

• Quantitative - Discrete

• Quantitative - Continuous

• Qualitative - Ordinal

Identify the sampling method:

In a large school district, all teachers from two buildings are interviewed to determine whether they believe the students have less homework to do now than in previous years.

• cluster

• random

• stratified

• voluntary response

• convenience