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

A company states that 2% of its computers are returned for defects.  We take a sample of 100 computers to find the probability of 10 being defective.  Is this a binomial distribution?

• No because there is not a fixed number of trials.
• No because their are more than 2 outcomes.
• Yes since there are a fixed number of independent trials, outcomes in 2 categories, and the probability of defect is constant.
• No since computers would not be independent.

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

The questions on a multiple choice test each have 6 answer choices. Which model can be used to simulate randomly selecting the correct answer on a 20 question multiple choice test?

• rolling a six-sided number cube 6 times
• rolling a six-sided number cube 20 times
• spinning a spinner with 4 equal sized sections 4 times
• choosing 1 marble in a bag of 20 different colored marbles

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

Given the person is a child, what is the relative frequency that they would pick neither?

• .26
• .195
• .286
• .214

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

A researcher plans to conduct a test of hypotheses at the α = 0.01 significance level.  She designs her study to have a power of 0.90 at a particular alternative value of the parameter of interest.  The probability that the researcher will commit a Type I error is

• 0.01
• 0.10
• 0.90
• 0.99

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

What is the probability of rolling a cube and having land as an odd number?

• 3/4
• 1/3
• 1/2
• 2/5

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TEKS.MATH.9-12.V.B

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

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

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

What is the difference in joint relative frequencies for males and females who preferred Sports Cars?

• 6
• 0.071
• 0.025

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

A line up for tickets to a local concert had an average (mean) waiting time of 20 minutes with a standard deviation of 4 minutes. If 2000 ticket buyers were in line, how many of them would expect to wait for less than 16 minutes?

• 320

• 1550

• 100

• 30

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

The chance of rain today is 70%. What is the chance it does not rain?

• 70%
• 30%
• 100%
• 50%

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

Draw one card from a standard deck. Find P(diamond)

• 8%

• 25%

• 31%

• 2%

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