A random sample of 15 college students were asked "How many hours per week typically do you work outside thehome?" Their responses are shown on the right.17251209.24Determine the shape of the distribution of hours worked by drawing a frequency histogram and computing themean and median. Which measure of central tendency better describes hours worked?1722151520292927.....Choose the correct frequency histogram below.A.Hours WorkedВ.Hours WorkedOC.Hours Workedper Weekper Weekper Week10 203010 20 3010 2030hourshourshoursFrequencyFrequencyFrequency Is the histogram for the data set skewed right, skewed left, or symmetric?skewed rightskewed leftsymmetricThe mean number of hours worked by college students outside the home is approximatelyhours.(Type an integer or decimal rounded to three decimal places as needed.)The median number of hours worked by college students outside the home is hours.Which measure of central tendency better describes hours worked?modemedianmean

Given: n = 15 Formula Used: Mean = ∑Xin Median = n+12thterm

Answered: A random sample of 15 college students…

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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The durations (minutes) of 26 electric power outages in the community of Sonando Heights over the past five years are shown below. 36 49 24 66 25 12 55 12 50 4 14 43 42 102 33 20 14 50 22 2 18 26 89 26 14 20 Click here for the Excel Data File (a) Find the mean, median, and mode. (Round your answers to 2 decimal places.) (b) Are the mean and median about the same? (c) Is the mode a good measure of center for this data set? multiple choice 1 Yes No (d) Is the distribution skewed? multiple choice 2 Yes, the distribution is skewed left. Yes, the distribution is skewed right. No, the distribution is symmetric.
3. The amount of time (in minutes) it took each individual in a sample of athletes to run a mile was recorded. In this particular sample, most of the athletes were able to run the mile quickly, but there were a small number of athletes who were not fast runners and needed more time to complete the mile. Two measures of center were computed for this sample: 12.9 minutes and 9.5 minutes. One of these measures is the mean and one is the median. Which measure must be the mean? A. The mean is 9.5 minutes because the distribution of running times would be skewed to the left. B. The mean is 9.5 minutes because the distribution of running times would be skewed to the right. c. The mean is 12.9 minutes because the distribution of running times would be skewed to the left. D. The mean is 12.9 minutes because the distribution running times would be skewed to the right.
You work at a bank and are asked to recommend the amount of cash to put in an ATM each day. You don't want to put in too much (security) or too little (customer irritation). Complete parts (a) through (c) below. Click the icon to view the the daily withdrawals (in 100s of dollars) for a period of 30 days. (a) Choose the correct relative frequency histogram for the data using eight classes below. O A. A 0.4- 0.3- 0.2 0.1- 0- C. A 0.4+ 0.3+ 0.2+ 0.1+ 0 58 62 66 70 74 78 82 86 59.5 63.5 67.5 71.5 75.5 79.5 83.5 87.5 (b) If you put $7750 in the ATM each day, what percent of the days in a month should you expect to run out of cash? 16.7 % (Round to the nearest tenth as needed.) (c) If you are willing to run out of cash for 10% of the days, how much cash should you put in the ATM each day? $ (Round to the nearest hundred dollars as needed.) 58 76 67 B. 88 71 73 0.4 0.3- 0.2- 0.1- 0- A 0.4- 0.3- 0.2- 0.1+ 0- Data Table 62 66 70 74 78 82 86 88 59.5 63.5 67.5 71.5 75.5 79.5 83.5 87.5 73 65 70…
A biologist measured the lengths of hundreds of cuckoo bird eggs. Use the relative frequency distribution below to answer the questions that follow. Lengths of Cuckoo Bird Eggs Length (in millimeters) Percent of eggs 18.75-19.75 0.8 19.75-20.75 4.0 20.75-21.75 17.3 21.75-22.75 37.9 22.75-23.75 28.5 23.75-24.75 10.7 24.75-25.75 0.8 (a) What percent of the group of eggs was less than 21.75 mm long? 60 X % (b) What is the probability that one of the eggs selected at random was at least 19.75 mm long but less than 21.75 mm long? 0.213
For the following data: 22 37 14 17 27 41 30 13 19 21 49 37 29 20 16 17 34 16 35 24 16 12 29 30 a. Which is more appropriate, a regular or a grouped frequency distribution table? Explain why. b. Construct the appropriate table. c. Based on the table, what is the shape of the distribution?
the table below shows the number of books the Jefferson Middle school students readeach month for nine months. Month Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May Number of Books 293 280 266 280 289 279 275 296 271 If the students read only 101 books for the month of June, which measure of central tendency will have the greatest change?A. The mean will have the greatest change.B. The median will have the greatest change.C. All measures will have an equal change.D. The mode will have the greatest change.
3. In a bar graph of qualitative data, the highest bar always corresponds to that data's А. Мean В. Median С. Мode D. Range E. Variance 4. If the data is skewed right, which of the following would you expect to be true? A. Mean > Median B. Mean < Median C. Mean = Median
A graduating class reported starting salaries represented on the following frequency table. Number of students Starting Salary ($) 10 15,000 17 20,000 25 25,000 38 30,000 27 35,000 21 40,000 45,000 For the data in the table above, what is the MEAN?
Suppose we want to know the mean number of shurikens thrown each night by ninjas in Konoha village. Getting this information from every ninja in the village would take forever. Instead, we randomly select 20 ninjas from the ninja school that is closest to us. a. Identify the population of interest in this survey b. Describe the parameter of interest in this survey. c. Identify the sample of interest in this survey.
II On Friday night, the owner of Chez Pierre in downtown Chicago noted the amount spent for dinner for 28 four-person tables. 95 103 109 114 113 107 10 OLT 104 08 134 124 105 84 176 115 69 68 95 108 61 091 87 128 95 61 150 52 136 E Click here for the Excel Data File (a) Find the mean, median, and mode. (Round your answers to 2 decimal places.) Descriptive Statistics Data Count Mean Median Mode (b) Are the data symmetric or skewed? If skewed, which direction? O Symmetric O Skewed left O Skewed right Graw 11!H < Prev 10 of 19 ....... 2 Type here to search < įXƏN
A researcher wants to determine the mean level of mercury found in 3 species of salt water shellfish: clam, oyster and crab. She randomly samples 100 shellfish of each species. She measures the amount of mercury in each specimen. 1. What is the experimental unit? [Select] 2. What is the response variable? [Select] 3. What is the factor? [Select] 4. What are the factor levels? [Select] > > > >
what is the mean of the data set?

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