n 3 of 16Here is a stemplot of the percent of residents aged 25 to 34 in each of the 50 states:1144Why did we split stems?1166778013466677888800000011114441212O So we would have more data to work with.O So that we could identify the peak around 13%1314O If we had not split the stems, most of the data wouldappear on just a few stems, making it hard to identifythe shape of the distribution.O To increase the variability of the data.77889990044145671511O So that we could identify 16.0% as the highest15amount.16N N M 3445

Answered: Image /qna-images/answer/dc7a6cee-ab60-40f2-92fa-7c1c6c3e3882.jpg

Answered: Here is a stemplot of the percent of…

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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Refer to the (incomplete) grouped frequency table data below which depicts the calorie content (in kCal) in 10grams of 45 different brands of biscuits.Calorie content(kCal)Number of brands(?)Midpoint(?)?? ??2 Cumulativefrequency0 < 8 3 4 12 48 38 < 16 8 12 96 1152 1116 < 24 A 20 360 7200 2924 < 32 11 28 B 8624 4032 < 40 5 36 180 6480 45Σ 45 - -11. The values of A and B, respectively, are:A. 18 and 340B. 16 and 308C. 18 and 380D. 18 and 308 Page 4 of 712. The values of Σ?? and Σ??2, respectively, are:A. 956 and 23504B. 965 and 23504C. 956 and 24305D. 956 and 2530413. The estimated mean, to the nearest kCal, is approximately:A. 23B. 21C. 19D. 2514. The mode (kCal) is approximately:A. 20.0B. 19.7C. 21.8D. 20.715. The standard deviation (in kCal) is approximately:A. 10.1B. 8.5C. 9.2D. 9.8
3
a. Total frequency = 82 Observations on the largest frequency: 90.0, 90.1, 90.1, 90.1, 90.3, 90.4, 90.4, 90.4, 90.5, 90.6, 90.7, 90.8, 90.9 O b. Total frequency = 82 Observations on the largest frequency: 87.4, 87.5, 87.6, 87.7, 87.8, 87.9 O. Total frequency cannot be determined by the present diagram Observations on the largest frequency: 90.0, 90.1, 90.1, 90.1, 90.3, 90.4, 90.4, 90.4, 90.5, 90.6, 90.7, 90.8, 90.9 d. Total frequency = 18 Observations on the largest frequency: 90.0, 90.1, 90.1, 90.1, 90.3, 90.4, 90.4, 90.4, 90.5, 90.6, 90.7, 90.8, 90.9
5. Suppose a marketing research firm would like to examine if the social networking site that a person primarily uses is influenced by his or her age. In a randomly drawn sample, 369 social network users were asked which site they primarily visited. These data are presented in the following table along with each person's age group. Complete parts a. through c. below. 1 Click the icon to view the data table. a. Using a = 0.025, perform a chi-square test to determine if age group and social networking site used are independent of one another. Identify the null and alternative hypotheses for a chi-square test of independence based on the information in the table. Choose the correct answer below. O A. Ho: Age group and social networking site are independent of one another. H: Age group and social networking site are not independent of one another. O B. Ho: Age group and social networking site are independent of one another. H,: The age group affects the social networking site. OC. Ho: Age…
Consider the below data: 62 / 78 / 84 / 62 / 72 / 78 / 54 /60 /78 / 80 The mode is: A. 54 B.80 C.62 D.78
A psychologist believed that as children get older, they engage in more “inactive activities” such as playing computer games, watching TV and surfing the internet. She collected data from 10 children. She recorded the age of each child and the amount of activity (in hours) the child engaged in per week. Age Activity 7 4.3 9 3.2 10 1 13 1.5 12 1.2 15 0.8 9 3 12 4 15 1.5 14 1.9 Using excel, obtain a scatterplot of the data. Discuss the relationship between age and activity based on the scatterplot. Using excel, obtain the simple linear regression linear regression line predicting activity from age. Interpret the intercept and slope of the regression line. By hand, predict the amount of activity for age = 14. By hand, calculate the residual for age = 14 Using excel output, test the null hypothesis that the slope coefficient is zero using the p-value approach. Write one sentence interpreting the meaning of this result. Make sure to report the test statistic…
QUESTION 17 Obtain the five-number summary for the given data. The test scores of 15 students are listed below. 40 46 49 54 56 62 67 70 73 77 85 87 90 94 95 40, 52.75, 70, 85.5, 95 40, 54, 70, 87, 95 40, 54, 71.5, 87, 95 40, 52.75, 71.5, 85.5, 95
Given the stem-and-leaf diagram. Answer the following questions: • The total frequency all stems Observations of the stem that has largest frequency Stem-and-leaf of C1 N - 82 Leaf Unit - 0.10 1 4 84 33 4 85 86 777 13 87 456789 24 88 89 23334556679 0233678899 90 0111344456789 0001112256688 22236777 023347 (13) 35 91 22 92 14 93 8 94 2247 95 4 96 97 15 2 2 98 8 1. 99 1 100 3 Q1 88.575 Median Q3 90.400 92.200 a. Total frequency = 18 Observations on the largest frequency: 90.0, 90.1, 90.1, 90.1, 90.3, 90.4, 90.4, 90.4, 90.5, 90.6, 90.7, 90.8, 90.9 b. Total frequency cannot be determined by the present diagram Observations on the largest frequency: 90.0, 90.1, 90.1, 90.1, 90.3, 90.4, 90.4, 90.4, 90.5, 90.6, 90.7, 90.8, 90.9 O.Total frequency = 82 Observations on the largest frequency: 90.0, 90.1, 90.1, 90.1, 90.3, 90.4, 90.4, 90.4, 90.5, 90.6, 90.7, 90.8, 90.9 O d. Total frequency = 82 Observations on the largest frequency: 87.4, 87.5, 87.6, 87.7, 87.8, 87.9 34 5 678 9012NM 435 2
Use the data below to answer this question: What is the class width, if you are creating a frequency distribution of 3 classes 2363 104 728 35678942345 which is the correct answer? a. 3 b 3.88 c. 4 d. 3.01
Lower Upper 9. f cf rf crf 10 14 0.18 0.18 15 19 7 16 0.14 0.32 20 24 10 0.2 0.52 25 29 7 33 0.14 0.66 30 34 17 50 0.34 1 The frequency table shown above shows ages from a random sample of 50 people. a. How many people are between 25 and 29 years of age? b. How many people are 29 years old or younger? c. How many people are older than 29? d. What percent of people are 29 years old younger? Enter a whole number. cor e. What percent of people are between 25 and 29 years of age? Enter a whole number. Submit Question Jump to Answer MacBook Air F2 F3 F4 11 F8 F5 F6 F7 %23 3. 4. <6 5 9928 LL

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