Identify the following data set:

....a manager of a movie theater was asking customers at the concession stand how they would rate the theater’s staff

Mr. Klassen waits at the school entrance and asks the first 100 students if they walk to school or not!

Find the area of the shaded region.

Find the area of the shaded region.

Test has a mean of 40 and a standard deviation of 10. What is the percent of people that scored above 62?

Shape?

As of January 2018, 48% of the governors of the 50 states in the US are Republicans.

Miss Houghton asks every 3rd person she drives past on the way home if they drink soda or not.

Mrs. Le asks the first 25 people to enter the basketball game arena who is their favorite NBA team.

Which Sample type was used below:

Mrs. Van Houten groups her students based on their grade. She then uses a hat to select 25 students from each grade level to take her survey.

Determine if the question is random or biased. When it comes to pets, do you prefer dogs?

At the end of the year, a math teacher decides to survey his students to determine what they liked best about his class. He uses his first period class as his sample.

Pfizer wants to know how effective their COVID vaccine is. They divide people into two groups and give one group a placebo and another the COVID vaccine. This is what type of study?

Your mother wants to see how many fruits and vegetables you're eating. She asks you and your siblings to keep a food journal for the next month. She will then look through the journals to assess if you're getting enough fruit and vegetables. This is an example of what kind of study?

Runners after an ultramarathon commonly develop respiratory infections. We want to know if taking 600 milligrams of vitamin C daily will reduce these infections. Researchers randomly assigned 100 ultramarathon runners to receive either vitamin C or placebo. All subjects were watched for 14 days after the big race to see if infections developed. Is this an RCE?

Runners after an ultramarathon commonly develop respiratory infections. We want to know if taking 600 milligrams of vitamin C daily will reduce these infections. Researchers randomly assigned 100 ultramarathon runners to receive either vitamin C or placebo. All subjects were watched for 14 days after the big race to see if infections developed. Which type of group are those who receive the Vitamin C?

Is the following question biased:

Do you care about your dog and take him for multiple walks?