HiSet: High School Equivalency Test: Math › Use statistics and data to gain information about a population
An ad campaign was run at 1200 fast food franchise locations. Two weeks later, a random sample of revenue of 80 locations was taken to measure the effectiveness of the ad campaign. Of the 80 locations, 60 locations reported increased sales.
Which of the following statements can be made with the greatest certainty?
An ad campaign was run at 1200 fast food franchise locations. Two weeks later, a random sample of revenue of 80 locations was taken to measure the effectiveness of the ad campaign. Of the 80 locations, 60 locations reported increased sales.
Which of the following statements can be made with the greatest certainty?
Researchers want to find the average age of indigenous people who inhabit a remote island. It is believed that the people of this island live abnormally long lives, so the average age of people is higher than in the rest of the world. The previously reported average age of people on the island is 47 years.
Researchers wanted to test the validity of this claim. They took a random sample of 50 people on the island and found that the average age of the sample was 28.5 years.
Which of the following statements can best be made, given the findings?
Researchers want to find the average age of indigenous people who inhabit a remote island. It is believed that the people of this island live abnormally long lives, so the average age of people is higher than in the rest of the world. The previously reported average age of people on the island is 47 years.
Researchers wanted to test the validity of this claim. They took a random sample of 50 people on the island and found that the average age of the sample was 28.5 years.
Which of the following statements can best be made, given the findings?