TEKS.MATH.9-12.V.B.1

You pick a marble from this bag.
What is the probability you will choose either a black or white marble?

• 3/5
• 9/100
• 1/10
• 2/5

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TEKS.MATH.9-12.V.B.1

What is the relative frequency (to the nearest percent) of boys among those who cannot bike to school? 

• 4%
• 14%
• 13%
• 29%

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TEKS.MATH.9-12.V.B.1

Find the z-score such that 30% of the standard normal curve lies to the left of z. 

• -1.88
• 0.52
• -0.52
• 1.88

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TEKS.MATH.9-12.V.B.1

What percent of people who bought no food purchased water?

• 14.3%
• 33.3%
• 5%
• 41.1%

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TEKS.MATH.9-12.V.B.1

If an event cannot occur, then its probability is 

• 1
• ½
• ¼
• 0

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TEKS.MATH.9-12.V.B.1

One ESP (extra sensory perception) test asks the subject to view the backs of cards and identify whether a circle, square, star , or cross is on the front of each card. If p is the proportion of correct answers, this may be viewed as a hypothesis test with H₀: p = 0.25 and H_a: p > 0.25. The subject is recognized to have ESP when the null hypothesis is rejected. What would a Type II error result in?

• Correctly recognizing someone has ESP

• Mistakenly thinking someone has ESP

• Not recognizing that someone really has ESP

• Correctly realizing that someone doesn't have ESP

• Failing to understand the nature of ESP

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TEKS.MATH.9-12.V.B.1

.5

• 1/3
• 1/4
• 1/2
• 3/4

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TEKS.MATH.9-12.V.B.1

Draw one card from a standard deck. Find P(ace of diamonds)

• 1/13

• 1/4

• 4/13

• 1/52

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TEKS.MATH.9-12.V.B.1

The normal curve shown represents the sampling distribution of a sample mean for sample size n = 25, selected at random from a population with standard deviation sd. Which of the following is the best estimate of the standard deviation of the population, sd ?75

• 3

• 6

• 15

• 30

• 75

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TEKS.MATH.9-12.V.B.1

A teacher wanted to analyse the performance of two sections of students in a mathematics test of 100 marks. Looking at their performances, she found that a few students got under 20 marks and a few got 70 marks or above. So she decided to group them into intervals of varying sizes as follows

0 – 20, 20 – 30, …, 60 – 70, 70 – 100. Then she formed the following table

Find the probability that a student obtained less than 20% in the mathematics test

• 7/90

• 20/90

• 15/90

• 1/90

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TEKS.MATH.9-12.V.B.1