1. For each day of last year, the number of vehicles passing through a certain intersection was recorded by a city engineer.One objective of this study was to determine the percentage of days that more than 425 vehicles used the intersection. Ifthe mean data was 375 vehicles per day and the standard deviation was 25 vehicles:(c) Suppose the relative frequency distribution for the data is bell-shaped, then what percentage of days325 and 425 vehicles used the intersection?95%at least 75%68%75%between

Given: For each day of last year, the number of vehicles passing through a certain intersection was…

Answered: 1. For each day of last year, the…

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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1. Which of the following are examples of statistics? a) Average weight of all adult dogs.b) The 75th percentile of all adult dog weights.c) The largest dog eats lots of blueberry pizza.d) The weight of the largest dog ever.
3. Find Mean, Median and Mode of the following frequency distribution and comment on the results: Daily Wages No, of employees 4-6 2 6-8 8-10 10 10-12 8 12-14 3 14-16
You are given the following data of an engineering experiment: a) Construct a frequency Table in which the data is arranged in an ascending order. b) Calculate : 1. The mean. 2. The median. 3. The mode. The range. (2 decimal places) 302.2 407.5 409.3 413.0 412.5 603.5 601.3 508.8 302.1 302.1 505.1 505.1 604.6 413.2 302.2 302.1 405.6 405.6 303.2 401.2 402.3 603.6 601.3 603.6 506.7 302.1 408.4 410.6 302.2 603.4 604.6 604.6 505.1 302.1 406.7 411.7 801.0 604.6 603.6 509.7 303.2 601.3 303.2 505.1 601.3 702.2 801.0 413.3
3. The number of customers at a dry-cleaning shop were recorded over a period of 30 working days. The results were as follows: 20 28 26 25 19 27 18 32 26 30 31 29 31 25 21 25 21 | 24 29 18 28 31 27 19 23 31 25 34 27 | 31 (a) Construct a cumulative relative frequency table and use this to draw a cumulative relative frequency curve. (b) Find the five-number summary for these data. (c) Display your answer to b. as a box and whisker plot
Construct a frequency distribution table for the following data: The number of persons living in each household in a certain compound in Karuhatan: 5, 9, 7, 3, 7, 5, 6, 3, 4, 6 8, 7, 5, 3, 9, 4, 8, 5, 9, 3 3, 7, 3, 6, 3
What is the median of the following data set? {:[32","6","21","10","8","11","12","36","17","16","15","18","40","24","21","23","24","24","29","16","32","31","10","30","35","32","18],[39","12","20]:} Identify the mode for the following data set:
For the following scores from a sample: a. Compute the mean, median and mode for the scores. b. Compute the SS, variance and SD. X f 7 1 6 2 5 2 4 2 3 1 MacBook Air
Consider the following frequency distribution: Score Freq 7,18,6,77,5,20,4,7,3,3,2,1,1,3 ScoreFrequency: 7,18,6,77,5,20,4,7,3,3,2,1,1,3 a. What was the sample size? b. What percent of participants had a score of 4? c. What is the percentile rank for a score of 5? d. What is the score corresponding to the 80th percentile?
18
5t. A magazine reports that women trust recommendations from a particular social networking site more than recommendations from any other social network platform. But does trust in this social networking site differ by gender? The following sample data show the number of women and men who stated in a recent sample that they trust recommendations made on this particular social networking site. Women Men Sample 150 170 Trust RecommendationsMade on the social networking site 111 102 (a) What is the point estimate of the proportion of women who trust recommendations made on this particular social networking site? (b) What is the point estimate of the proportion of men who trust recommendations made on this particular social networking site? (c) Provide a 95% confidence interval estimate of the difference between the proportion of women and men who trust recommendations made on this particular social networking site. (Round your answers to four decimal places.)
Ms. Lorraine Finch, a fifth grade teacher has a large class of 50 students for the 2018 - 2019 school year. After giving a reading comprehension test, Ms. Finch decided to do a brief statistical analysis. A frequency distribution of the results is presented below. a. Fill in the missing pa rts of Ms. Finch’s frequency distribution. Do any necessary scrap work in the space next to the table. b. Construct a histogram of the frequency distribution. c Is the distribution of test scores normal? Explain. Score Frequency Relative Frequency 84 2 0.04 85 5 0.1 86 0.08 87 8 0.16 88 10 89 90 5 0.1 91 4 0.08 92 3 0.06
In January 2013, a poll by ABC News indicated that Obama's popularity had reached a three-year high. Suppose the relative frequency of occurrence of each response, grouped by sex, is given in the following table. Rating Excellent Very Good Good Fair Poor Answer: Women Men Relative Relative Frequency Frequency 0.184 ≈ 0.23 unknown 0.25 unknown unknown 0.225 unknown ≈ 0.167 0.103 Assume • the proportion of men's responses rated as either Very Good or Good is 0.488, • the proportion of women's responses rated as either Good or Fair is .353, • the proportion of men's responses rated as Good is≈ 93.6% larger than the proportion of women's responses the same (relative to the women's one), and • the proportion of men's responses rated as Very Good is 14.58% larger than the proportion of women's responses rated as Fair (relative to the women's one.) What proportion of women's responses is rated as Good? (Type your final answer in decimal form (rounded to the nearest hundredth), like 0.36. DO…

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