1-20chapter stats

Based on a random sample of 25 units of product x the

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Unformatted text preview: an .66. What is the critical value (given in terms of the value of the test statistic) at α = .01? A. 1.282 B. 1.645 C. 1.960 D. 2.326 68. A recent study conducted by the state government attempts to determine whether the voting public supports further increase in cigarette taxes. The opinion poll recently sampled 1500 voting age citizens. 1020 of the sampled citizens were in favor of an increase in cigarette taxes. The state government would like to decide if there is enough evidence to establish whether the proportion of citizens supporting an increase in cigarette taxes is significantly greater than .66. What is the sample value of the test statistic? A. 1.348 B. 1.661 C. 3.452 D. 1.635 1-726 Chapter 01 - An Introduction to Business Statistics 69. A recent study conducted by the state government attempts to determine whether the voting public supports further increase in cigarette taxes. The opinion poll recently sampled 1500 voting age citizens. 1020 of the sampled citizens were in favor of an increase in cigarette taxes. The state government would like to decide if there is enough evidence to establish whether the proportion of citizens supporting an increase in cigarette taxes is significantly greater than .66. What is the p-value for this test? A. 0511 B. 1022 C. 0548 D. 0446 70. A null hypothesis H0: µ ≥ 2.4 is not rejected at a significance level of 0.04. (α = 0.04). The standard deviation for the normally distributed population is known to be 0.40. Determine the Type II error, if we assume that the actual mean is 2.125 based on a sample size of 16. A. 8413 B. 1587 C. 3413 D. 3177 71. When testing a null hypothesis about a single population mean and the population standard deviation is unknown, if the sample size is less than 30, one compares the computed test statistic for significance with a value from the ___________ distribution. A. t B. Z C. Binomial D. Chi-square 72. For a given hypothesis test, if we do not reject H0, and H0 is true. A. No error has been committed. B. Type I error has been committed. C. Type II error has been committed. D. Type III error has been committed. 1-727 Chapter 01 - An Introduction to Business Statistics 73. If a null hypothesis is rejected at a significance level of .01, it will ______ be rejected at a significance level of .05. A. Always B. Sometimes C. Never 74. If a null hypothesis is rejected at a significance level of .05, it will ______ be rejected at a significance level of .01. A. Always B. Sometimes C. Never 75. If a null hypothesis is not rejected at a significance level of .05, it will ______ be rejected at a significance level of .01. A. Always B. Sometimes C. Never 76. If a two-sided null hypothesis is rejected for a single mean at a given significance level, the corresponding one- sided null hypothesis (i.e., the same sample size, the same standard deviation, and the same mean) will _________ be rejected at the same significance level. A. Always B. Sometimes C. Never 77. If a two-sided null hypothesis cannot be rejected for a single mean at a given significance level, then the corresponding one-sided null hypothesis (i.e., the same sample size, the same standard deviation, and the same mean) will _________ be rejected at the same significance level. A. Always B. Sometimes C. Never 1-728 Chapter 01 - An Introduction to Business Statistics 78. If a one-sided null hypothesis for a single mean cannot be rejected at a given significance level, then the corresponding two-sided null hypothesis (i.e., the same sample size, the same standard deviation, and the same mean) will _________ be rejected at the same significance level. A. Always B. Sometimes C. Never 79. If a one-sided null hypothesis is rejected at a given significance level, then the corresponding two-sided null hypothesis (i.e., the same sample size, the same standard deviation, and the same mean) will _________ be rejected at the same significance level. A. Always B. Sometimes C. Never 80. Type II error is defined as the probability of ________________ H0, when it should ___________. A. failing to reject; be rejected B. failing to reject; not be rejected C. rejecting, not be rejected D. rejecting, rejected 81. For the following hypothesis test where H0: µ ≤ 10 vs. Ha: µ > 10, we reject H0 at level of significance α and conclude that the true mean is greater than 10 when the true mean is really 8. Based on this information we can state that we have: A. Made a Type I error B. Made a Type II error C. Made a correct decision D. Increased the power of the test 1-729 Chapter 01 - An Introduction to Business Statistics 82. For the following hypothesis test where H0: µ ≤ 10 vs. Ha: µ > 10, we reject H0 at level of significance α and conclude that the true mean is greater than 10 when the true mean is really 14. Based on this information we can state that we have: A. Made a Type I error B. Made a Type II error C. Made a correct decision D. Increased the power of the test 83. A major...
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This document was uploaded on 01/20/2014.

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