7.SP.1-2 QZ Wk 1/25/21 POPULATION MEAN

A hospital wants to conduct a survey to find out what patients think about the quality of medical services provided by its doctors and staff. Which of these samples would give it the best results?

• taking the opinion of the entire staff in the hospital

• taking the opinion of patients in the cardiology wing of the hospital

• taking the opinion of all the doctors who treat patients in the

  hospital

• taking the opinion of every fifth patient who is discharged from the

  hospital

A sample should be

• representative of  only middle school students only

• a very large group

• representative of the population

• representative of people who volunteer

Each dot represents 1 day. How many days were recorded?

• 9

• 21

• 20

• 105

Terry made the dot plot above to chart the amount of time, in minutes, that it took students to eat breakfast in the morning. How many students took 5 or more minutes to eat their breakfast?

• 11

• 12

• 14

• 16

Find the mean of these numbers:
5, 11, 2, 12, 4, 2

• 4.1

• 6

• 4.5

• 4

Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected. 

• systematic

• random sample

• convenience

• biased sampling

Allie wants to learn the most popular board game in the United States, so she creates a poll and shares it on Twitter. Random or Biased/

• Random

• Biased

Zeke wants to find out how 7th graders at OMS get to school so he places the names of all 7th graders into a fish bowl and pulls out 50 names so he can survey them. Random or Biased?

• Random

• Biased

Jacob wants to determine the favorite candy among all 7th graders. He asks all the people who sit in his row in Math class. Random or Biased?

• Random

• Biased

Ray wants to determine the most popular brand of soda in all of Missouri. He polls all the houses on his street to get a sample. Random or Biased?

• Random

• Biased