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1. A result is called "statistically significant" whenever A. The null hypothesis is true. B. The alternative hypothesis is true. C. The p-value is less than or equal to the significance level. D. The p-value is larger than the significance level. 2. In hypothesis testing, a Type Il error occurs when A. The null hypothesis is not rejected when the null hypothesis is true. B. The null hypothesis is rejected when the null hypothesis is true. C. The null hypothesis is not rejected when the alternative hypothesis is true. D. The null hypothesis is rejected when the alternative hypothesis is true. 3. Null and alternative hypotheses are statements about: A. Population parameters C. Population statistics B. Sample parameters D. Sample statistics 4. A hypothesis test at 0.05 level of significance is done which the alternative hypothesis is that more than 10% population is left-handed. The p-value of the test is calculated to be 0.25. Which statement is correct? A. We can conclude that more than 10% of the population is left-handed. B. We can conclude that more than 25% of the population is left-handed. C. We cannot conclude that more than 10% of the population is left-handed. D. We cannot conclude that more than 5% of the population is left-handed. 5. Hypothesis testing involves: A. Deciding between two mutually exclusive hypotheses Ho and Ha. B. Deciding if the investigation was internally and externally valid. C. Deciding if the differences between groups was large or small. D. All of the above If a = 0.05 and the p-value of the statistic calculated from the data is 0.02, then: A. We should retain the null hypothesis 6. B. We should reject the alternative hypothesis C. We should reject the null hypothesis at a=0.05 D. We should change the value of a to 0.01 so that the findings will become significant. 7. Which of the given statements is/are true? 1. If a is set at 0.01 instead of 0.05, then the probability of making a Type l error decreases. II. If Ho is false and we reject it, we have made a Type Il error.

1. A result is called "statistically significant" whenever A. The null hypothesis is true. B. The alternative hypothesis is true. C. The p-value is less than or equal to the significance level. D. The p-value is larger than the significance level. 2. In hypothesis testing, a Type Il error occurs when A. The null hypothesis is not rejected when the null hypothesis is true. B. The null hypothesis is rejected when the null hypothesis is true. C. The null hypothesis is not rejected when the alternative hypothesis is true. D. The null hypothesis is rejected when the alternative hypothesis is true. 3. Null and alternative hypotheses are statements about: A. Population parameters C. Population statistics B. Sample parameters D. Sample statistics 4. A hypothesis test at 0.05 level of significance is done which the alternative hypothesis is that more than 10% population is left-handed. The p-value of the test is calculated to be 0.25. Which statement is correct? A. We can conclude that more than 10% of the population is left-handed. B. We can conclude that more than 25% of the population is left-handed. C. We cannot conclude that more than 10% of the population is left-handed. D. We cannot conclude that more than 5% of the population is left-handed. 5. Hypothesis testing involves: A. Deciding between two mutually exclusive hypotheses Ho and Ha. B. Deciding if the investigation was internally and externally valid. C. Deciding if the differences between groups was large or small. D. All of the above If a = 0.05 and the p-value of the statistic calculated from the data is 0.02, then: A. We should retain the null hypothesis 6. B. We should reject the alternative hypothesis C. We should reject the null hypothesis at a=0.05 D. We should change the value of a to 0.01 so that the findings will become significant. 7. Which of the given statements is/are true? 1. If a is set at 0.01 instead of 0.05, then the probability of making a Type l error decreases. II. If Ho is false and we reject it, we have made a Type Il error.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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1. A result is called "statistically significant" whenever A. The null hypothesis is true. B. The alternative hypothesis is true. C. The p-value is less than or equal to the significance level. D. The p-value is larger than the significance level. 2. In hypothesis testing, a Type Il error occurs when A. The null hypothesis is not rejected when the null hypothesis is true. B. The null hypothesis is rejected when the null hypothesis is true. C. The null hypothesis is not rejected when the alternative hypothesis is true. D. The null hypothesis is rejected when the alternative hypothesis is true. 3. Null and alternative hypotheses are statements about: A. Population parameters C. Population statistics B. Sample parameters D. Sample statistics 4. A hypothesis test at 0.05 level of significance is done which the alternative hypothesis is that more than 10% population is left-handed. The p-value of the test is calculated to be 0.25. Which statement is correct? A. We can conclude that more than 10% of the population is left-handed. B. We can conclude that more than 25% of the population is left-handed. C. We cannot conclude that more than 10% of the population is left-handed. D. We cannot conclude that more than 5% of the population is left-handed. 5. Hypothesis testing involves: A. Deciding between two mutually exclusive hypotheses Ho and Ha. B. Deciding if the investigation was internally and externally valid. C. Deciding if the differences between groups was large or small. D. All of the above 6. If a = 0.05 and the p-value of the statistic calculated from the data is 0.02, then: A. We should retain the null hypothesis B. We should reject the alternative hypothesis C. We should reject the null hypothesis at a=0.05 D. We should change the value of a to 0.01 so that the findings will become significant. 7. Which of the given statements is/are true? If a is set at 0.01 instead of 0.05, then the probability of making a Type I error decreases. 1. II. If Ho is false and we reject it, we have made a Type Il error. A. I only B. Il only C. both I and II D. neither I nor Il
Transcribed Image Text:1. A result is called "statistically significant" whenever A. The null hypothesis is true. B. The alternative hypothesis is true. C. The p-value is less than or equal to the significance level. D. The p-value is larger than the significance level. 2. In hypothesis testing, a Type Il error occurs when A. The null hypothesis is not rejected when the null hypothesis is true. B. The null hypothesis is rejected when the null hypothesis is true. C. The null hypothesis is not rejected when the alternative hypothesis is true. D. The null hypothesis is rejected when the alternative hypothesis is true. 3. Null and alternative hypotheses are statements about: A. Population parameters C. Population statistics B. Sample parameters D. Sample statistics 4. A hypothesis test at 0.05 level of significance is done which the alternative hypothesis is that more than 10% population is left-handed. The p-value of the test is calculated to be 0.25. Which statement is correct? A. We can conclude that more than 10% of the population is left-handed. B. We can conclude that more than 25% of the population is left-handed. C. We cannot conclude that more than 10% of the population is left-handed. D. We cannot conclude that more than 5% of the population is left-handed. 5. Hypothesis testing involves: A. Deciding between two mutually exclusive hypotheses Ho and Ha. B. Deciding if the investigation was internally and externally valid. C. Deciding if the differences between groups was large or small. D. All of the above 6. If a = 0.05 and the p-value of the statistic calculated from the data is 0.02, then: A. We should retain the null hypothesis B. We should reject the alternative hypothesis C. We should reject the null hypothesis at a=0.05 D. We should change the value of a to 0.01 so that the findings will become significant. 7. Which of the given statements is/are true? If a is set at 0.01 instead of 0.05, then the probability of making a Type I error decreases. 1. II. If Ho is false and we reject it, we have made a Type Il error. A. I only B. Il only C. both I and II D. neither I nor Il
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