NeSA NeSA Data Analysis & Statistics 2

Question 1

A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of picking a blue marble?

Accepted Answer

5/10

Answer

Probability = favorable outcomes / total outcomes = 5/10 = 1/2.

Question 2

A student rolls a standard six-sided die. What is the probability of rolling a number greater than 4?

Accepted Answer

1/3

Answer

Numbers greater than 4 are 5 and 6, giving 2 favorable outcomes out of 6: 2/6 = 1/3.

Question 3

A spinner has 8 equal sections numbered 1–8. What is the probability of landing on an even number?

Accepted Answer

1/2

Answer

Even numbers 1–8 are 2, 4, 6, 8 — that is 4 out of 8 sections = 1/2.

Question 4

Which of the following represents an impossible event?

Accepted Answer

Drawing a 7 from a standard deck of cards

Answer

A standard deck has no card labeled '7' as a face card with value 7... wait, actually it does. Let me reconsider: drawing a red ace from a deck that has all aces removed would be impossible. Among these choices, drawing a 7 from a standard deck is possible; however drawing a card numbered higher than 13 would be impossible.

Question 5

A class took a quiz. The scores were: 70, 75, 80, 80, 85, 90, 95. What is the mean?

Accepted Answer

82

Answer

Sum = 575; mean = 575 / 7 ≈ 82.1, which rounds to 82.

NeSA - Nebraska State Accountability Practice Test

NeSA - Nebraska State Accountability Practice Test

NeSA NeSA Data Analysis & Statistics 2