False The F test assumes that the sampled populations are not normal. A. True B. False The F test for equality of two variances tests whether the ratio of the sample variances differ significantly from 1. A.
* Question 1 2 out of 2 points | | | Probability trees are used only to compute conditional probabilities. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 2 2 out of 2 points | | | Seventy two percent of all observations fall within 1 standard deviation of the mean if the data is normally distributed. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 3 2 out of 2 points | | | If two events are not mutually exclusive, then P(A or B) = P(A) + P(B) Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 4 2 out of 2 points | | | The maximin approach involves choosing the alternative with the highest or lowest payoff. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 5 2 out of 2 points | | | Both maximin and minimin criteria are optimistic. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 6 2 out of 2 points | | | The Hurwicz criterion is a compromise between the maximax and maximin criteria.
B. using a non-random sample. C. relying too heavily on a statistical generalization. D. All of these. 2.) Which of the following statements is not true?
Which t ratio in Table 2 represents the greatest relative or standardized difference between the pretest and 3 months outcomes? Is this t ratio statistically significant? Provide a rationale for your answer. The t ratio of 4.14 represent the greatest relative or standardized difference between the pretest and 3 months outcomes. Yes, it is significant because as indicated by the asterisk, p <0.05 is the least acceptable value for statistical significance.
The plastic starts at T=165.58 and will curve all the way down slowly below T= 69.55. 3. Would the derivative of a function modeling the data points be increasing, decreasing, or constant? Explain your reasoning. The derivative of the function would be decreasing, because it would have a negative derivative.
RES/342--- This produced a 28/30 on the final 1) What are the critical z-values for a two-tailed hypothesis test if the significant level = 0.01? C. ± 2.58 2) In classical hypothesis testing, the test statistic is to the critical value what the __________. A. ‘p-value’ is to alpha 3) For a hypothesis test of a single population mean at 95% confidence level, a calculated Z score of 1.7 supports the conclusion that A. the population mean is greater than the hypothesized value 4) If the paired differences are normal in a test of mean differences, then the distribution used for testing is the C. student distribution 5) One hundred women were polled and 60 reported successfully communicating an automobile problem to an auto repairman. A sample of 150 men had 95 reporting the same success.
For what values of t will the null hypothesis not be rejected? a) To the left of -1.645 or to the right of 1.645 b) To the left of -1.345 or to the right of 1.345 c) Between -1.761 and 1.761 d) To the left of -1.282 or to the right of 1.282 2. Which of the following is a characteristic of the F distribution? a) Normally distributed b) Negatively skewed c) Equal to the t-distribution d) Positively skewed Complete Answers here QNT 561 3. For a chi-square test involving a contingency table, suppose the null hypothesis is rejected.
For what values of t will the null hypothesis not be rejected? a) To the left of -1.645 or to the right of 1.645 b) To the left of -1.345 or to the right of 1.345 c) Between -1.761 and 1.761 d) To the left of -1.282 or to the right of 1.282 2. Which of the following is a characteristic of the F distribution? a) Normally distributed b) Negatively skewed c) Equal to the t-distribution d) Positively skewed Want help? Download now QNT 561 3.
Was this an expected finding? Provide a rationale for your answer. The mean baseline depression score of the experimental group is 14.00 and the mean posttest depression score of the experimental group is 13.36. The posttest score is 0.64 lower than the baseline score. This was expected as the experimental group finished the six week empowerment program.
Quantitative Methods Mid term Question 1 Deterministic techniques assume that no uncertainty exists in model parameters. Selected Answer: True Question 2 An inspector correctly identifies defective products 90% of the time. For the next 10 products, the probability that he makes fewer than 2 incorrect inspections is 0.736. Selected Answer: True Question 3 A joint probability is the probability that two or more events that are mutually exclusive can occur simultaneously. Selected Answer: False Question 4 A decision tree is a diagram consisting of circles decision nodes, square probability nodes, and branches.