Questions from Essentials of Statistics


Q: We have given the relative frequencies for the null hypothesis of a

We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test and the sample size. Decide whether Assumptions 1 and 2 for using that test are satisfied. Sample s...

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Q: Each year the director of the reading program in a school district

Each year the director of the reading program in a school district administers a standard test of reading skills. Then the director compares the average score for his district with the national averag...

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Q: This exercise involves the use of an unrealistically small population to provide

This exercise involves the use of an unrealistically small population to provide a concrete illustration for the exact distribution of a sample proportion. A population consists of three men and two w...

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Q: We have given the relative frequencies for the null hypothesis of a

We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test and the sample size. Decide whether Assumptions 1 and 2 for using that test are satisfied. Sample s...

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Q: Of the 38 numbers on an American roulette wheel, 18 are

Of the 38 numbers on an American roulette wheel, 18 are red, 18 are black, and 2 are green. If the wheel is balanced, the probability of the ball landing on red is 18/38 = 0.474. A gambler has been st...

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Q: We have given the relative frequencies for the null hypothesis of a

We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test and the sample size. Decide whether Assumptions 1 and 2 for using that test are satisfied. Sample s...

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Q: In a national poll, 1053 U.S. adults were

In a national poll, 1053 U.S. adults were asked, “As you may know, Congress is considering a new economic stimulus package of at least 800 billion dollars. Do you favor or oppose Congress passing this...

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Q: We have given the relative frequencies for the null hypothesis of a

We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test and the sample size. Decide whether Assumptions 1 and 2 for using that test are satisfied. Sample s...

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Q: In the article “Prothrombotic Factors in Children With Stroke or Porencephaly

In the article “Prothrombotic Factors in Children With Stroke or Porencephaly” (Pediatrics Journal, Vol. 116, Issue 2, pp. 447–453), J. Lynch et al. compared differences and similarities in children w...

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Q: We have given the relative frequencies for the null hypothesis of a

We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test and the sample size. Decide whether Assumptions 1 and 2 for using that test are satisfied. Sample s...

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