TEKS.MATH.9-12.IV.D.2

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6
• 1/2
• 1/3
• 1/6

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TEKS.MATH.9-12.IV.D.2

TEKS.MATH.7.6D

TEKS.MATH.7.6E

What is the probability of rolling a 4 on a fair number cube and getting “tails” when tossing a coin?

• 1/7
• 1/12
• 5/8
• 1/2

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TEKS.MATH.9-12.IV.D.2

What is the probability of passing this class, if you do all your work?

• 25%
• 60%
• 83%
• 100%

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TEKS.MATH.9-12.IV.D.2

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

The scoring of modern IQ is such that Intelligence Quotients (IQs) have a normal distribution of μ= 100 and 𝞂 = 15.

Mensa International is a non-profit organization that accepts only people with IQ score within the top 2%. What level of IQ qualifies one to be a member of Mensa?

• 115
• 130.75
• 145
• 120

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TEKS.MATH.9-12.IV.D.2

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

Professional golfer John Daly is known for his long drives off the tee. Suppose his drives have a mean distance of 315 yards with a standard deviation of 12 yards. What lengths of drives will constitute the middle 60% of all of his drives?

• 303 yards to 327 yards
• 0 to 318 yards
• 312 yards to 318 yards
• 305 to 325 yards

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TEKS.MATH.9-12.IV.D.2

In a recent poll of 803 randomly selected baseball fans in Connecticut, 44% said their favorite team was the Yankees. If researchers wanted to reduce the margin of error to at most 2%, how many baseball fans do they have to randomly select? 

• 1564
• 2367
• 803
• 3170

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TEKS.MATH.9-12.IV.D.2

When leaving for school, you make a judgement on these hypotheses. H_o: The weather will remain dry. H_a: It will rain. What are the results of the Type I and Type II errors?

• Type I: Needlessly carry around an umbrella all day. Type II: Get drenched

• Type I: Get drenched. Type II: Needlessly carry around an umbrella all day

• Type I: Carry umbrella & it rains. Type II: Carry no umbrella & it doesn't rain

• Type I: Get drenched. Type II: Carry umbrella & it rains

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TEKS.MATH.9-12.IV.D.2

Eva flips a coin. If she gets heads, she wins $4. If she gets tails, she loses $3. What is her expected value of a coin flip?

• $1

• $0.50

• -$0.50

• $0

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TEKS.MATH.9-12.IV.D.2

A test is made of H₀ : µ = 17 versus H₁ : µ < 17 is performed using α = 0.01 significance level. The value of the test statistic is z = -2.68 and it is concluded that H₀ is rejected.

If the true value of µ is 10, is the conclusion a Type I Error, Type II error, or a correct decision?

• Type I

• Type II

• Correct Decision

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TEKS.MATH.9-12.IV.D.2

A recent survey found that out of 400 random American adults, 89% pay their bills on time. The margin of error in this survey was 2%. What is the interval of values in which the truth is likely found?

• 89% - 91%

• 87% - 89%

• 87% - 91%

• 388 - 402

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TEKS.MATH.9-12.IV.D.2

TEKS.MATH.9-12.VI.C.1