Practice Test 4 –Bus 2023 Directions: For each question find the answer that is the best solution provided. There is only one correct answer. 1. For a sample size of 30, changing from using the standard normal distribution to using the t distribution in a hypothesis test, a. will result in the rejection region being smaller b. will result in the rejection region being larger c. would have no effect on the rejection region d. Not enough information is given to answer this question. ANSWER: a -recall that all the t-values are larger than the z-values so it makes it more difficult to reject the null.
5. A test statistic is a value determined from sample information used to reject or not reject the null hypothesis. 6. The region or area of rejection defines the location of all those values that are so large or so small that the probability of their occurrence under a true null hypothesis is rather remote. 7.
Answer | | | | | Selected Answer: | True | Correct Answer: | False | | | | | Question 5 2 out of 2 points | | | A systematic approach to model formulation is to first construct the objective function before determining the decision variables. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | Question 6 2 out of 2 points | | | In formulating a typical diet problem using a linear programming model, we would expect most of the constraints to be related to calories. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | Question 7 0 out of 2 points | | | A systematic approach to model formulation is to firstAnswer | | | | | Selected Answer: | all of the above | Correct Answer: | define decision variables | | | | | Question 8 0 out of 2 points | | |
So, if we take random values for r2 between 0 and 1 then we will get different values of time intervals in weeks between successive breakdowns. 3. Lost revenue It is given that they charge $0.10 per copy and number of copies sold in one day follows a uniform probability distribution between 2000 and 8000 copies. Therefore, if we chose a random variable r3 whose value is in between 2000 and 8000 then the lost revenue will be 0.1×r3×repair time. By putting different values for r3, we can get a number of lost revenues by simulation method.
This will report any margin of error within individual testing due to imperfect reliability. The SEM is representing the true score within a range of scores. For example, an SEM of 3 is an indication that the true score is within a variable of 3 somewhere in either direction, plus or minus. The smaller the SEM reveals the
TOPIC 8 Chi-Square goodness-of-fit test Problem 12.1 Use a chi-square goodness-of-fit to determine whether the observed frequencies are distributed the same as the expected frequencies (α = .05) Category | fo | fe | 1 | 53 | 68 | 2 | 37 | 42 | 3 | 32 | 33 | 4 | 28 | 22 | 5 | 18 | 10 | 6 | 15 | 8 | Step 1 Ho: The observed frequencies are distributed the same as the expected frequencies Ha: The observed frequencies are not distributed the same as the expected frequencies Step 2 df = k – m – 1 Step 3 α = 0.05 x 2 0.05, 5df = 11.0705 Step 4 Reject Ho if x 2 > 11.0705 Category | fo | fe | | 1 | 53 | 68 | | 2 | 37 | 42 | | 3 | 32 | 33 | | 4 | 28 | 22 | | 5 | 18 | 10 | | 6 | 15 | 8
The test statistic is used to determine whether the researcher should use the null or alternative hypothesis. The third step is to state the conditions that will accept or reject the null hypothesis and identify the critical value for the test statistic. The critical value separates the non-reject region from the reject region ("Test Of Hypothesis", 2014). The fourth step is to compute the appropriate test statistic and compare it with the critical value. The null hypothesis is rejected if the computed
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 Final Exam 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 QNT 561 Final Questions and Answers QNT 561 Final Exam 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 3. For a chi-square test involving a contingency table, suppose the null hypothesis is rejected.
c) Filter the data to display only records with an amount received greater than zero. (Hint: The filter arrows will reappear when you add the filter.) d) Use the Subtotal command to calculate and display the total amount received for each fund. (Hint: The subtotal should be calculated for each fund name, and the Grand Total should appear at the bottom of the Amt Received