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1 | | For a null hypothesis statement, it always includes: |
| | A) | a hypothesized value for the sample statistic. |
| | B) | a statement of equality: (=), (≤) or (≥). |
| | C) | a statement of less than: (<). |
| | D) | a statement of greater than: (>). |
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2 | | Which of the following statements is true about the alternate hypothesis? |
| | A) | It is accepted if the null hypothesis is rejected. |
| | B) | It will always contain an equal sign. |
| | C) | It is rejected if the null hypothesis is true. |
| | D) | It is accepted if the null hypothesis is accepted. |
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3 | | Which of the following statements is true about the level of significance? |
| | A) | It is a probability. |
| | B) | It can be any value between 0 and 1. |
| | C) | It is the likelihood of rejecting the null hypothesis when it is true. |
| | D) | All of the above. |
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4 | | A Type I Error is: |
| | A) | calculated from sample information. |
| | B) | a probability determined from the test statistic. |
| | C) | the probability of rejecting the null hypothesis when it is true. |
| | D) | the probability of accepting the null hypothesis when it is false. |
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5 | | When testing a null hypothesis, a critical value is: |
| | A) | calculated from sample information. |
| | B) | always positive. |
| | C) | the point that divides the acceptance region from the rejection region. |
| | D) | a probability determined from the test statistic. |
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6 | | In a one-tailed hypothesis test: |
| | A) | the rejection region is in only one of the tails of a distribution. |
| | B) | the rejection region is split between the tails of a distribution. |
| | C) | the area of the rejection region equals the p-value. |
| | D) | the area of the rejection region is twice the value of the p-value. |
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7 | | To use a z statistic in a one-sample hypothesis test of a mean, we need to know: |
| | A) | the population mean. |
| | B) | the population standard deviation. |
| | C) | the degrees of freedom. |
| | D) | the margin of error. |
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8 | | A p-value is equal to the: |
| | A) | population proportion. |
| | B) | significance level. |
| | C) | fraction of the population that has a particular characteristic. |
| | D) | probability of finding a value of the test statistic that is equal or more extreme (greater than or less than) than the value of the test statistic assuming the null hypothesis is true. |
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9 | | A Type II Error occurs when we: |
| | A) | accept the null hypothesis when it is false. |
| | B) | reject the alternate hypothesis when it is true. |
| | C) | reject the null hypothesis when it is false. |
| | D) | accept the null hypothesis when it is true. |
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10 | | Which of the following statements are correct when deciding whether to use the z or the t distribution? |
| | A) | Use the z distribution in a test of proportions when nπ and n(1 - π) are greater than or equal to 5. |
| | B) | Use the z distribution when we have a normal population and we know the population standard deviation. |
| | C) | Use t when the population is normal and the population standard deviation is not known. |
| | D) | All of the above statements are correct. |
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11 | | For H0: µ = 10, with α = 0.05, and (0.0K) = 12, σ = 4, n = 16, what decision is made regarding the null hypothesis? |
| | A) | The null hypothesis is accepted. |
| | B) | Fail to reject the null hypothesis. |
| | C) | Reject the null hypothesis. |
| | D) | Reject the alternative hypothesis. |
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12 | | For H0: µ = 10, with α = 0.05, and (0.0K) = 12, s = 4, n = 16, what decision is made regarding the null hypothesis? |
| | A) | The null hypothesis is accepted. |
| | B) | Fail to reject the null hypothesis. |
| | C) | Reject the null hypothesis. |
| | D) | Reject the alternative hypothesis. |
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13 | | In a hypothesis test, the p-value is 0.001. The stated significance level is 0.05. What is the decision regarding the null hypothesis? |
| | A) | Reject the null hypothesis. |
| | B) | Reject the alternate hypothesis. |
| | C) | Accept the null hypothesis. |
| | D) | No decision. |
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14 | | For H0: π = 0.70, with α = 0.05, using p= 0.85 and n = 100, what is the decision regarding the null hypothesis? |
| | A) | The null hypothesis is accepted. |
| | B) | Fail to reject the null hypothesis. |
| | C) | Reject the null hypothesis. |
| | D) | Reject the alternative hypothesis. |
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15 | | For H0: π = 0.80, α = 0.05, using p= 0.85 and n = 150, what is the decision regarding the null hypothesis? |
| | A) | The null hypothesis is accepted. |
| | B) | Fail to reject the null hypothesis. |
| | C) | Reject the null hypothesis. |
| | D) | Reject the alternative hypothesis. |
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