19. When the alternative hypothesis in a statistical decision experimentutilizes the less than ("<") inequality sign, which of the following is FALSE?O A. The hypothesis test is left-tailed.O B. The expected sign of the test statistic is negative.O C. There are two critical t-values.O D. The critical value is to the left of the axis of symmetry of the distribution.

Ans- When the alternative hypothesis in a statistical decision experiment utilizes the less then…

Answered: 19. When the alternative hypothesis ina…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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6. It occurs when the given statistics hypothesis assumes a less than or greater than the value. a. Level of Significance b. two-tailed test c. one-tailed test 7. It is the degree of significance in which we accept or reject the null hypothesis. a. Level of Significance b. two-tailed test c. one-tailed test 8. It is a point on the distribution that is compared to the test statistic to determine if the null hypothesis is rejected. a. rejection region b. non-rejection region C. critical value 9. It is the set of all values of the statistics that causes to reject the null hypothesis. b. non-rejection region c. critical value a. rejection region 10. It is the set of all values that causes to fail to reject null hypothesis. a. rejection region b. non-rejection region C. critical value
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11. The relationship between confidence intervals and hypothesis testing In an effort to better manage his inventory levels, the owner of two steak and seafood restaurants, both located in the same city, hires a statistician to conduct a statistical study. The owner is interested in whether the restaurant located on the south side sells more halibut fillets per night than the restaurant located on the north side of the city. The statistician selects a random sample of size n₁ = 35 nights that the southside restaurant is open. For each night in the sample, she collects data on the number of halibut fillets sold at the southside location and computes the sample mean M₁ = 7.32 and the sample variance s2 = 36. Likewise, she selects a random sample of size n2 = 32 nights that the northside restaurant is open. For each night in the sample, she collects data on the number of halibut fillets sold at the northside location and computes the sample mean M2 = 3.00 and the sample variance s² = 30.…
13. The sign of the alternative hypothesis in a two-tailed test is always A. C. greater than D. less than equal B. not equal 14. This hypothesis states that there is no difference between population parameters and the hypothesized value. A. hypothesis B. alternative hypothesis C. null hypothesis D. two-tailed hypothesis 15. "The ratings given by male and female students with regard to the online teaching skills of their teachers is the same." This statemen example what kind of hypothesis? A. one-tailed hypothesis B. alternative hypothesis C. null hypothesis D. two-tailed hypothesis 16. "The use of social media as modern approach of advertising will increase the demand for a new product." This is an exam __hypothesis. A. Mean B. null C. alternative D. two-tailed 17. Which is the correct alternative hypothesis for one-tailed test? A. µ = 25 B. µ # 25 C.µ ≥ 25 D. p < 25 18. Mrs. Nazareth conducted a research on the preference of residents of Mayapa in choosing their venue for occasions.…
Assume you ran a One-Way ANOVA test and failed to reject the null bypothesis. If your goal were to find which of the populations had different averages and by how much, which of the following would be the appropriate next step? Calculate a Fisher's Confidence Interval for each of the groups. O Calculate the number of Fisher's Confidence Intervals neceded which is determined by c-1 added factorially. O Complete the appropriate one-tailed t-test. Proceed to the F table and find the appropriate test statistic. No further work would be required as you are not able to prove differences exists among at least one of the groups.
5. Assume that the population has a normal distribution. Thirty randomly selected students took the calculus final. If the sample mean was 83 and the standard deviation was 13.5, construct a 99% confidence interval for the mean score of all students, O 76.21 < u < 89.79 O 76.23 < u < 89.77 O 76.93 < u < 89.07 O 78.81 < u < 87.19
A student was analyzing a data set that was Normally distributed with a mean of . She calculated the z-score of a score z in the data set and looked up this value on a z-table (the same z-tables we have been using in class). The table gave a value of 0.4918 in this instance. Which of the following statements is true. O Any score in this data set has a 49.18% chance of being between 2 and z. O The score has a probability of 49.18. O The standard deviation of this data set is 0.4918 O The score x is 0.4918 standard deviations away from the mean.
a. if the null hypothesis is true (avg. anxiety level score of children in the sample is the same as the avg. nationwide score; mu = 100), what can you say about the distribution of x-bar among simple random samples of 46 children? b. calculate the p-value on this distribution. given the p-value, what conclusions can you draw?
Which of the following statements about hypothesis testing is false? A. A Type I error is the chance that the researcher rejects the null hypothesis when in fact the null hypothesis is true. B. The test will never confirm the null hypothesis, only fail to reject the null hypothesis. C. In both the one - tailed and two-tailed tests, the rejection region is one contiguous interval on the number line. D. The rejection region is always given in units of standard deviations from the mean.
2. Write a paragraph that explains why "the z-score associated with the raw score of x; (i.e., zri) is the number of standard deviations x; is above the mean," rather than, "the z-score associated with the raw score of x; (i.e., zr.) is the number of standard deviations x; is above or below the mcan."
1.176(d),1.177
The researchers found that 83.3% of students in the sample have rarely or never used the food pantry on campus. We will test whether it is plausible that more than 80% of all students on campus have rarely or never used the campus food pantry. Identify (describe in words) the parameter and include the appropriate symbol. State the null and alternative hypotheses in symbols. Use the One proportion inference applet to create a distribution of 1000 simulated sample statistics (with the “Proportion of successes” option) and include a screenshot below that shows what you entered in the applet as well as the resulting distribution. Check the Summary Statistics box and explain why the values of the mean and SD (SE) make sense according to theory-based methods. Use the applet to find a p-value for this situation. Explain how you do this, and include a screenshot that shows the relevant portion of the applet, including the distribution of simulated sample statistics. State the value of…

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