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1 | |
To conduct a nonparametric test |
| | A) | The population must follow the normal distribution. |
| | B) | The standard deviation must be known. |
| | C) | It is not necessary to make any assumption about the shape of the population. |
| | D) | The data must be at least interval scale. |
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2 | |
Which of the following is not a characteristic of the c2 distribution? |
| | A) | Its shape is based on the sample size. |
| | B) | It is not negative. |
| | C) | It is positively skewed. |
| | D) | It approaches a normal distribution as the degrees of freedom increase. |
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3 | |
In a goodness-of-fit test where the sample size is 200, there are 5 categories, and the significance level is .05. The critical value of c2 is |
| | A) | 9.488 |
| | B) | 11.070 |
| | C) | 43.773 |
| | D) | None of the above. |
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4 | |
In a goodness-of-fit test |
| | A) | All the cell frequencies must be the same. |
| | B) | There must be at least 30 observations. |
| | C) | Forty percent of the cells must contain at least 10 observations. |
| | D) | None of the above. |
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5 | |
In a contingency table |
| | A) | The number of rows must be the same as the number of columns. |
| | B) | A variable is classified according to two criteria. |
| | C) | There must be at least 10 observations in each cell. |
| | D) | All of the above. |
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6 | |
In a contingency table a sample of 400 people are classified by gender and hair color (4 groups: blond, brown, black, and red). How many degrees of freedom are there? |
| | A) | 3 |
| | B) | 8 |
| | C) | 399 |
| | D) | None of the above. |
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7 | |
For a c2 goodness-of-fit test |
| | A) | There is only one degree of freedom. |
| | B) | The rejection region is in the upper right tail. |
| | C) | The scale of measurement is interval. |
| | D) | We must assume a normal population. |
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8 | |
To find the expected frequency in a contingency table |
| | A) | Take the square root of the degrees of freedom. |
| | B) | Multiply the row and column totals and divide by the grand total. |
| | C) | Use the total number of observations minus one. |
| | D) | None of the above. |
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9 | |
Under what condition could the c2 distribution assume negative values? |
| | A) | When the sample size is small. |
| | B) | When the cell frequencies are all equal. |
| | C) | When the degrees of freedom is 1. |
| | D) | Never |
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10 | |
Sixty senior account executives were classified into three groups, labeled A, B, and C. There were 26 in group A, 19 in group B and 15 in group C. We wish to test whether, at the .05 significance level, it is reasonable to conclude that the proportion in each group in the population is the same. How many degrees of freedom are in the study? |
| | A) | 60 |
| | B) | 59 |
| | C) | 3 |
| | D) | 2 |
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11 | |
Sixty senior account executives were classified into three groups, labeled A, B, and C. There were 26 in group A, 19 in group B and 15 in group C. We wish to test whether, at the .05 significance level, it is reasonable to conclude that the proportion in each group in the population is the same. What is the critical value of c2? |
| | A) | 5.991 |
| | B) | 4.605 |
| | C) | 7.815 |
| | D) | None of the above. |
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12 | |
Sixty senior account executives were classified into three groups, labeled A, B, and C. There were 26 in group A, 19 in group B and 15 in group C. We wish to test whether, at the .05 significance level, it is reasonable to conclude that the proportion in each group in the population is the same. What is the computed value of c2? |
| | A) | 3.10 |
| | B) | 12.00 |
| | C) | 62 |
| | D) | None of the above. |
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13 | |
Sixty senior account executives were classified into three groups, labeled A, B, and C. There were 26 in group A, 19 in group B and 15 in group C. We wish to test whether, at the .05 significance level, it is reasonable to conclude that the proportion in each group in the population is the same. Which of the following is a correct conclusion? |
| | A) | Reject H0. The proportion in the three groups is the same. |
| | B) | Reject H0. The proportion in the three groups is not the same. |
| | C) | Do not reject H0. The proportion in the three groups is the same. |
| | D) | Do not reject H0. The proportion in the three groups is not the same. |
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