puooos e puS - N JO uea e sy adues auo zzsample has a mean of M 10. The two samples arecombined into a single set of scores.a. What is the mean for the combined set if both ofthe original samples have n 5 scores?b. What is the mean for the combined set if the firstsample has n -4 scores and the second samplehas n 6?C. What is the mean for the combined set if the firstsample has n 6 scores and the second sample1中=STy

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Answered: 22. One sample has a mean of M-5 and a…

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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A sample has a mean of 230 and a median of 290. If one person with a score of 10 is removed from this sample, which of the following is most likely? The mean and median will decrease equally. The mean will certainly stay the same, but the median will either decrease or stay the same. The mean will certainly increase. The median might also increase, but not as much as the mean. The mean will not change, but the median will likely increase. The mean will certainly decrease. The median might also decrease, but not as much as the mean. The mean and median will increase equally. The mean will certainly increase, and the median will likely decrease.
1. Identify a1 of this data: 1, 2, 3, 4,4, 5 ,6, 6 ,7,8,9, 1o. A. 3 C. 4 B. 3.25 D. 4. 25 9. Vhat is the mean of this data? 3x10, 4x105 , 5x1of GXI05, 7x105. A. 3,5 X10 C 6.5 X105 B. 4x105 D. 7 X105 10. f x is the qverage of 2 & 3, y is the average of x *2, z is the qverage of x 95, find +the average of x,y & z. A. 9. 375 4. 6875 В. 3. 125 0. 3.75
37. The mean score for a set of data is marked by the dotted line on the following graph. Which value is a likely z-score for the indicated value? Choose from a.-2.1, b. 0, or c. 2.7. Z= ? X
Q2. The 30% trimmed mean of the following data (120, 15O, 170, 177, 178, 193, 198, 250, * :450, 955} is 186.5 O 182.5 O 188.3 183.5 O 184.5 O
11. A manager of a department times how many hours each person works within her department. 43 42 24 50 41 28 47 47 39 59 29 31 39 42 What is the mean and median of the data? Group of answer choices Mean = 40.1; Median = 41.5 Mean = 40.0; Median = 42.5 Mean = 40; Median = 42 Mean = 40.8; Median = 47
2.1 answer #3
which statement is NOT true about the following set of data?
10. Determine if the number of absences incurred by a student is related to his or her final test score in a Statistics class. The data obtained in a study is from seven randomly selected students. No. of Absences, x 6. 15 9. 12 8. Final grade, y 82 86 43 74 58 90 78 41 16.4
A math professor is wondering if students today are better or worse than in the past. He has given the same final to this year's class that he gave ten years ago. Compute mean, median, and mode for both classes and write a paragraph summarizing the differences. This Year 35 45 65 75 87 80 69 71 53 90 99 95 70 82 73 93 67 61 57 74 72 77 71 81 83 Ten Years Ago 56 77 75 76 59 74 51 89 55 79 67 77 69 91 68 90 65 79 69 79 87 86 98 91 95
A researcher is interested in determining if there is a relationship between handedness and penmanship. To study this question, the researcher submitted samples from 100 students to penmanship experts. The samples were rated to be of low, medium or high penmanship quality. The observed frequencies were totaled according to left verses right handedness. Penmanship Handedness low medium high Left 8 29 6 right 9 37 11 Which test is appropriate for this data? Why? Calculate row, column and table totals. State the null and alternative hypothesis. What is the degree of freedom? What is the value of the test statistic? What is the p-value? Are the data statistically significant at the 5% significance level? Do you recognize any flaws in this study
5. Which set of four test scores would have the biggest difference between the mean and the median? O A. 32, 85, 89, 91, 92, 92 O B. 72, 78, 79, 80, 82, 82 O C. 65, 70, 75, 80, 85, 90 O D. 30, 34, 39, 41, 48, 50
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

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