**Title: Analyzing Age Distribution in Suburban Areas**A demographic study was conducted to verify the age distribution among residents in suburban areas. The study focused on six age groups. The observed frequencies and theoretical proportions under the null hypothesis are detailed in the table below.| Age Group | Under 20 | [20, 30) | [30, 40) | [40, 50) | [50, 65) | 65 and Above | Total ||---------------|----------|---------|---------|---------|---------|-------------|-------|| **Frequency** | 132 | 148 | 224 | 62 | 188 | 46 | 800 || **Proportions** | 0.15 | 0.20 | 0.25 | 0.10 | 0.25 | 0.05 | 1.00 || **EXPECTED** | | | | | | | |### Tasks1. **Determine Expected Counts:** - Calculate the expected frequencies for each age group under the null hypothesis and fill them in the table. 2. **Evaluate the Test Statistic:** - Use the expected and observed frequencies to calculate the test statistic.**Solution**[The solution area is left blank in the image for future computation and elaboration.]

Given information: Age Group under 20 [20, 30) [30, 40) [40, 50) [50, 650 65 and Above Total…

Answered: Demographic study was conducted to…

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 2012 study of freely forming groups in bars all over Europe examined the natural behavior of groups. The researchers recorded the group size (number of individuals in the group) of all 501 groups in the study that were naturally laughing. The findings were displayed in the figure below. 300 Number of groups 250 200 O 52 O 2.7 0 2 150 3.5 4 100 50 0 254 2 Enter your answer here The median laughter group size in this study is 168 3 The mean laughter group size in this study is O 100.2 Enter your answer here 52 4 5 Laughter group size 21 6 6 Can we conclude from these findings that, in European bars in 2012, smaller groups were more likely than larger groups to be naturally laughing? Explain your statistical reasoning in one sentence.
A hypertension trial is mounted, and 12 participants are randomly assigned to receive either a new medication or a placebo. Each participant takes the assigned medication, and the participants’ SBP is recorded after 6 months on the assigned medication. The data are shown in Table 7–9. Is there a difference in mean SBP between treatments? Run the appropriate test at a = 0.05. Placebo New Medication 134 114 143 117 148 121 142 124 150 122 160 128
10) The following table shows the sample subjects cross-classified by gender and the type of violent victimization reported. Can we conclude on the basis of these data that victimization status and gender are not independent? Let a =0.01. Gender Women Men Total No victimization 611 308 919 Partner 42 20 62 Non-partner 16 17 33 Total 669 345 1014
Section 3.1, question 3
I need help with question 7
QUESTION 8 Find the mode(s) for the given sample data. 20, 38, 46, 38, 49, 38, 49 49 38 39.7 46
The city of Hampton is surveying households to see if the number of cats per household has changed over the past decade. The last known average of cats per household was 1.08. What statistical procedure should you use to analyze these data? O one sample z test Oone sample t test O correlated groups t test O independent groups t test
Lower Upper f cf rf crf 14 19 10 10 0.2 0.2 20 25 11 21 0.22 0.42 26 31 8 29 0.16 0.58 32 37 6. 35 0.12 0.7 38 43 15 50 0.3 1 The frequency table shown above shows ages from a random sample of 50 people. a. How many people are between 20 and 25 years of age? b. How many people are 25 years old or younger? c. How many people are older than 25? d. What percent of people are 25 years old or younger? Enter a whole number. cor e. What percent of people are between 20 and 25 years of age? Enter a whole number. Submit Question Jump to Answer MacBook Air O00 O00 F4 11 F8 F2 F3 F5 F6 F7 F9 %23 24 & * 3 4. 8. 9- E RI 6
11)
When a student performs poorly on a midterm exam, the student sometimes is convinced that their score is an anomaly and that they will do much better on the final exam. The data below show the midterm and final scores (out of 100 points) for eight students in an introductory statistics class. Student Midterm Final 1 70 88 2 58 52 3 85 84 4 82 74 5 70 80 40 36 7 85 48 8 85 96 a) Construct a scatterplot for the data. Describe the pattern that you see in the scatterplot. Are there any clusters or outliers? If so, how would you explain them? b) Calculate the regression line for predicting a student's score on the final exam based on the student's score on the midterm.
Is there an association between hair color and body type? The table below shows the results of a researcher's observations of randomly selected people. Frequencies of Hair Colors for Various Body Types Blonde Brunette Red Head 71 80 96 108 55 115 46 91 Short and Slender Short and Pudgy Tall and Slender Tall and Heavy What can be concluded at the o= 0.01 significance level? 53 74 69 63
2. A coach gave her team a test on sit-ups completed in one minute. Using the data collected, the coach constructed the following frequency distribution: Scores 90-99 80-89 70-79 60-69 50-59 40-49 30-39 20-29 10-19 0-9 a. 9 12 17 13 10 7 3 1 What is the percentile score for a raw score of 38? Show your work. b.) The coach wants to take the top 20% of the team and train them for the World Sit-up Championships. What raw score cut-off would be used to choose the team? Show your work. Note: you can't have part of a person on the team.

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