Statistics & Probability Review

According to a random telephone survey, 85% of all working adults in the U.S. are satisfied with their current job. If I asked 500 adults, how many do you predict would be satisfied with their current job?

• 85 adults
• 340 adults
• 500 adults
• 425 adults

According to a random telephone survey of 200 adults, 75% of all working adults in the U.S. are satisfied with their current job. What is the population in this survey?

• 200 adults
• adults in the U.S.
• 75% of adults

Zoie completes a report by asking 70 students across campus. She found that 48% of CTMS students do not wash their hands after using the bathroom. What is the population of her survey?

• the bathroom
• CTMS students
• 48% of students 

Biased or Random?

John wants to find out what the favorite soda flavor is at Menifee County. He decides to ask all the students in Mr. Goldsmith's class as a sample group.

• Biased

• Random

Biased or Random?

Reign wants to determine the most popular brand of cereal in all of Kentucky. So he polls all the houses on his street to get a sample.

• Biased

• Random

Biased or Random?

Alexis wants to learn what the most popular board game in the United States is, so she creates a poll and shares it on Twitter.

• Biased

• Random

Biased or Random?

Jameson and Brevon want to determine the most popular Basketball player in all of Menifee County so they poll everyone at lunch.

• Biased

• Random

Biased or Random?

Spencer wants to determine who the most popular Twitch.tv streamer in the United States is. So he hacks the U.S. Census and includes the question in the 2020 census form that goes to every household in America.

• Biased

• Random

Biased or Random?

Zane wants to determine the favorite candy among all 7th graders. So he asks all the people who sit in his row in Math class.

• Biased

• Random

According to a random telephone survey, 85% of all working adults in the U.S. are satisfied with their current job. If I asked 500 adults, how many do you predict would be satisfied with their current job?

• 85 adults
• 340 adults
• 500 adults
• 425 adults