For a study on teen social habits, Nolan is interested in seeing if there's a difference, between two schools,in the number of texts students sent this past Friday. He randomly samples students from each of thesetwo schools. Here is a summary of the results:School ASchool BМean45 texts36 textsStandard deviation6 texts5 textsNumber of students4040Nolan wants to use these results to carry out a two-sample t test to determine if the mean numbers oftexts are significantly different for these schools. Assume that all conditions have been met.Which of the following would be an appropriate test statistic for Nolan's test?36 – 455.5V40(36 – 45) – 05.525.524040(45 – 36) – 062V524040(36 – 45) – 05.525.524040(45 -t =6.36) – 054040

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Description: For a study on teen social habits, Nolan is interested in seeing if there's a difference, between two schools,in the number of texts students sent this past Friday. He randomly samples students from each of thesetwo schools. Here is a summary of the

Given : Testing for Equality of Variances A F-test is used to test for the equality of variances.…

Math

Statistics

Which of the following would be an appropriate test statistic for Nolan's test? 36 – 45 t = 5.5 A V40 (36 – 45) – 0 - 5.52 V B 5.52 40 40 (45 – 36) – 0 - 62 52 40 40 (36 – 45) – 0 5.52 5.52 D 40 40 (45 – 36) – 0 t = 6. - E 5 40 40

Which of the following would be an appropriate test statistic for Nolan's test? 36 – 45 t = 5.5 A V40 (36 – 45) – 0 - 5.52 V B 5.52 40 40 (45 – 36) – 0 - 62 52 40 40 (36 – 45) – 0 5.52 5.52 D 40 40 (45 – 36) – 0 t = 6. - E 5 40 40

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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Q.No.1. Given below are the marks of 40 students in a.class test out of 15:- 7.5 8.2 6.2 8.9 7.8 5.4 9.4 9.9 10.9 10.8 7.4 9.7 11.6 12.6 5.0 10.2 9.2 12.0 9.9 7.3 7.3 8.4 10.3 10.1 10.0 11.1 6.5 12.5 7.8 6.5 8.7 9.3 12.4 10.4 9.19.7 9.3 6.2 10.3 6.6 Find its D3 and P73, comment on theses quantities. Make a grouped frequency distribution of this data and again calculate its D3 and P73 Compare your results of part (a) and part (b). a. b. с.
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? Q # W 13 * 3 $ 4 f5 % 5 f6 6 & D 7 fg * 4+ 8 fg hp f10 O f11 a 12 E + = || ins From a sample with n=24, the mean number of televisions per household is 2 with a standard deviation of 1 television. Using Chebychev's Theorem, determine at least how many of the households have between 0 and 4 televisions. DOL At least of the households have between 0 and 4 televisions. (Simplify your answer.) Time Remaining: 00:21:25 Next 71°F Sunny 2:21 PM 13 5/23/2022 delete pg up ← backspace prt sc home end num lock * pg dn
ar Xx D bry 3 N adio D 5 Help B 1 4 ! 6 D 7 8 9 10 11 q 12 a alt @ 2 10 Z A study of elite distance runners found a mean body weight of 63.1 kilograms (kg), with a standard deviation of 4.8 kg. Use the 68-95-99.7 rule to find the proportion of runners whose body weight is between 48.7 and 67.9 kg. type your answer.... What proportion of runners have body weights below 60 kg? type your answer... type your answer..... What proportion of runners have body weights above 70 kg? Previous -> ↑ W S #m 3 X e d $ % 4 % C % C r f % 5 t g A 6 DELL O V b y h & 7 O u G n * 8 Ö i m ( 9 k 4 O alt ) O 1 Р 4 ctrl { [ + = < Next } رام backsp 1 V
Consider the boxplot below. 11 + 10 21 20 30 X 34 40 data 50 50 a. What quarter has the smallest spread of data? Second Quarter Third Quarter First Quarter O Fourth Quarter OB b. What is that spread? 11 c. Find the Inter Quartile Range (IQR): 24 d. Which interval has the most data in it? 49 - 64 37 - 50 O 21 - 34 O 11-21 60 64 X X e. What value could represent the 27th percentile? 12 54 39 022 70 X
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D Question 4 For a 100-point exam, a score of X = 65 is definitely above the median. 4 O True False
E Fit to page D Page view A Read aloud 1. Add ne QUESTION I The following stem-and-leaf display gives the scores of a sample of 30 students on a statistıcs exam 0 2 7 1 4 9 8. 7 1 2 2 6 7 9 9 3 4 7 7 7 9. 3. Which statement is incorrect? 1 The median is equal to 78 2 The mode iIs equal to 87. 3 40% of the students scored above 80% 4 The range is equal to 48 5 10% of the students scored less than 60% QUESTION 2 Бearch - 00 II
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nin nin nax пах D1 D2 48 108 22 57 nin nax D3 33 74 10 20 30 40 50 60 70 80 90 100 110 120 Which of the following are true? (technical note: if needed adjust the width of your browser window so that the boxplots are one below the other) O A. The data in D3 is skewed right. O B. At least a quarter of the data values in D2 are less than all of the data values in D3 . O C. Three quarters of the data values for D2 are greater than the median value for D1 D. At least a quarter of the data values for D3 are less than the median value for D2. O E. At least three quarters of the data values in D1 are less than all of the data values in D2 . O F. The median value for D1 is less than the median value for D3 .
3 d What is the median of the data? C 40 O 200 O 90- с e 90 4 f Weekly spending on groceries ($) V 60 % 5 t bo 80 6 b Oll y 100 O 100 O 140 up h 7 n u 120 * 00 - 8 i 3 140 9 k + O P 1 O
Given the sample data. x: 21 17 15 30 25 (a) Find the range.(b) Verify that Σx = 108 and Σx2 = 2,480. Σx = Σx2 = (c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s2 and sample standard deviation s. (Round your answers to two decimal places.) s2 = s = (d) Use the defining formulas to compute the sample variance s2 and sample standard deviation s. (Round your answers to two decimal places.) s2 = s = (e) Suppose the given data comprise the entire population of all x values. Compute the population variance ?2 and population standard deviation ?. (Round your answers to two decimal places.) ?2 = ? =