Which data set is the most clustered around its mean?

a. 10, 30, 40, 20

b. 12, 14, 36, 38

c. 8, 42, 30, 30

d. 30, 25, 15, 30

Answer is D

a girl drove to her cabin. it took one hour longer to get there than it did to come back. the average speed there was 30 km/h. the average speed back was 45 km/h. how many hours did the trip there take?

A theatre seats 2000 people and charges $10 for a ticket. At this price, all the tickets can be sold. A survey indicates that if the ticket price is increased, the number sold will decrease by 100 for every dollar of increase.

The Student Council is surveying students about the cafeteria food at their school. They survey every 5th person from one bus at their school. Is this survey valid? A. Yes; there is a system to the survey B. Yes; the sample is large enough C.

Ellen, Lora, and Mai are avid collectors of ice hockey trading cards. Together Lora and Ellen have 371 cards. If lora and Mai combined their cards, they would total 481. The sum of Ellen's and Mai's cards is 404.

Which of the following is equivalent to 16^3/4 a) 6 b) 8 c) 12 d) 64

A jar contains 2 red, 1 white, and 3 blue marbles. Two marbles are drawn. If X equals the number of red marbles drawn, which of the following tables shows the correct data?

What is proportional and non proportional relationship

An app developer projects that he will earn $230.00 for every 100 apps downloaded. Which of the following equations can be used to represent the proportional relationship between the number of apps, x, and the total earning, y.

The base of a parallelogram with the area (A) of 72 square inches and height (H) of 6 inches. Use the formula for the area of a parallelogram A = bh

According to the MIT Airline Data Project, American Airlines controlled 15.5% of the domestic market during a recent year. A random sample of 125 domestic passengers that year was selected.