For numbers 12 to 17, use the grouped frequency distribution below.Four sections of students were given the same test in mathematics. The results are shownbelow.FrequencyClass IntervalSection KSection LSection MSection N55–612148–5432441-4743734-4027-3320-2613–19464712Total2220262212. Which section has the highest mean?А. КВ. LС. МD. N13. Which section has the lowest median?А. КВ. LС. МD. N14. Which section has the highest mode?В. LА. КС. МD. N.15. Which section has the lowest mean?А. КВ. LС. МD. N16. Which section has the lowest mode?А. КВ. LС. МD. N17. Which two sections have the same median?A. Mand NB. Kand LC. Kand MD. Land N

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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12. x: 471.7 659.3 740.5 790.5 781.3 1047.3 969.5 1206.1 y: 446.3 680.2 725.2 765.3 740.4 1005.6 936.3 1156.8 Using the data find the y mean 219.60 833.28 205.42 807.01
7. A random sample of 400 men and 400 women was randomly selected and asked whether they planned to attend a concert in the next month. The results are listed below. Perform a homogeneity of proportions test to test the claim that the proportion of men who plan to attend a concert in the next month is the same as the proportion of women who plan to attend a concert in the next month. Use a = 0.05. Меп Womeп Plan to attend concert 230 255 Don't plan to attend concert 170 145
a. Qi b. Q3 3. The revenues of the top eleven personal computer manufacturers are given (in hundred millions). 1. 27 a. Compute the first quartile. -C. M. 7 8. 9. 9. 10 b. The third quartile. c. Determine the median. d. Draw a box plot for the data. е. е. Calculate Pearson's coefficient of skewness.
4) A set of 15 data points has mean 28.2. When one data point is disregarded, the mean of the remaining 14 data points is 27. What is the value of the disregarded data point?
5. The effectiveness of a flu vaccine is tested by treating one group of subjects with the vaccine while another group of subjects is given placebos. Is there a significant difference among the two groups? а. Claim: b. Но: На: С. Analysis: d. Tail of the distribution:
17. Exams I, II, and III have mean results of 67, 72, and 76, respectively, and standard deviations of 11, 8, and 5, respectively. Mary takes exam I, John takes exam II, and Sarah takes exam III. They each score 83. Rank them from lowest to highest results according to z-scores. (A) John, Sarah, Mary (C) Mary, John, Sarah (B) John, Mary, Sarah (D) Mary, Sarah, John If you feel the answer is none of the choices given, submit no answer to the question.
1.) Suppose that a teacher wants to see if a new teaching method improves test scores in their class. Luckily, they also know that the average score of all students in the United States in that grade is 85 and the sd is 10. Given that their class of 25 students’ (the sample) Mean score is 90... What is the standard error? 1 2 1.5 2.5 ----------------------------------------- 2.) Calculate the standardized effect size for question 1. What can you say about this effect size? It is a small effect size It is a moderate effect size It is a large effect size Cannot calculate the standardized effect size with the information given. ------------------------------------------------------------------------------------- 3.) Students have taken an exam. The mean was 70 and the standard deviation was 2. A student who scored 72, scored better than: 84% 30% 20% 99%…
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17- How do you find Median for even number of observations under ungrouped method? a. Arrange the data in ascending order and multiply middle two numbers b. Arrange the data in ascending order and find the difference of middle two numbers c. Arrange the data in ascending order and add middle two numbers d. Arrange the data in ascending order and take the average of middle two numbers
16. The mean score of 15 male students taking an economics test is 74 and the mean score of 12 female students taking the same test is 77. The combined mean score of 27 male and female students is: a. 74.67 b. 77.33 c. 75.33 d. 75.67
25. If the random variable X ~ A(H, o²), then what is the mode of X? 26. If the random variable X ~ A(u, o²), then what is the median of X?
Give two sets of five numbers that have the same mean but different standard deviations. OSet 1: 4, 5, 7, 8, 11 Set 2: 3, 6, 7, 9, 10 OSet 1: 2, 4, 6, 8, 10 Set 2: 3, 4, 5, 7, 11 OSet 1: 4, 6, 7, 8, 15 Set 2: 3, 6, 7, 10, 14 OSet 1: 2, 3, 7, 11, 12 Set 2: 5, 6, 7, 8, 9 CSet 1: 3, 4, 6, 9, 13 Set 2: 2, 5, 7, 8, 13 Give two sets of five numbers that have the same standard devlation but different means. OSet1: 2, 5, 7, 12, 14 Set2: 5, 6, 7, 8, 9 CSet 1: 2, 3, 4, 5, 6 Set 2: 4, 5, 6, 7, 8 CSeti: 2, 5, 6, 10, 12 Set2: 5, 6, 7, 10, 12 CSeti: 2, 3, 5, 7, 8 Set2: 4, 6, 7, 11, 12 CSet1: 4, 5, 6, 12, 13 Set2: 4, 5, 7, 9, 10

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12. Which section has the highest mean? А. К В. L С. М D. N 13. Which section has the lowest median? В. L А. К С. М D. N 14. Which section has the highest mode? А. К В. L С. М D. N