A sample of 255 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classifiedaccording to preferred source of current events information ("television", "newspapers", "radio", or "internet sites"). The results are given in the contingencytable below.TelevisionNewspapers RadioInternet sitesRegistered25343437Not registered50332121What is the relative frequency of adults in the sample who are not registered to vote and prefer to obtain their information through newspapers?Round your answer to two decimal places.ப5

- Relative frequency is the number of times event happens divided by the total number of events…

Answered: A sample of 255 adults is selected. 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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These are the times, in minutes, that a group of people took to answer a Sudoku puzzle. 5, 4, 11, 8, 4, 43, 10, 7, 12 Calculate an appropriate measure of central tendency to summarise these times. Explain why the other measures are not suitable.
A polling organization contacts 1620 undergraduates who attend a university and live in the United States and asks whether or not they had spent more than $200 on food in the last month. What is the population in the study? A. Undergraduates who attend a university. B. Undergraduates who attend a university and live in the United States. OC. Undergraduates who attend a university and live in the United States and have spent more than $200 on food. D. Undergraduates who attend a university and have spent more than $200 on food. What is the sample in the study? OA. Undergraduates who attend a university and live in the United States. B. The 1620 undergraduates who attend a university and live in the United States. OC. The 1620 undergraduates who attend a university and have spent more than $200 on food. OD. Undergraduates who attend a university.
2. State the type of sample being collected. The quality control officer at a manufacturing plant needs to determine what percentage of items in a batch are defective. The officer chooses every 15th batch off the line and counts the number of defective items in each chosen batch
A sample of 239 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classified according to preferred source of current events information ("television", "newspapers", "radio", or "internet sites"). The results are given in the contingency table below. Television Newspapers Radio Internet sites Registered 46 16 29 36 Not registered 31 20 32 29 What is the relative frequency of adults in the sample who prefer to obtain their information through newspapers? Round your answer to two decimal places.
a. Are all of the 811 opinions accounted for in the table? Add another category if necessary. b. Create a pie chart to describe the data. c. Create a bar chart to describe the data. d. Rearrange the bars in part c so that the categories are ranked from the largest percentage to the smallest e. Which of the three methods of presentation--part b, c, or d is the most effective?
1250 were surveyed, 911 drank alcohol or used illegal drugs, 425 drank alcohol only. How many drank alcohol and used illegal drugs, but did not smoke cigarettes?
A grocery store owner wishes to know which of the three grocery stores in town is most frequently visited by the residents of the town. Which of these is an example of a convenience sample? A.Set up a table at the town fair and talk to passers-by. B.Send a letter to each household with a survey asking the householder to send it back. C.Hire a market researcher to visit every tenth home in the town. D.Pick names from the telephone book at random to be called.
A survey of freshmen revealed the following information: •24 signed up for a math class. • 28 signed up for a biology class. •20 signed up for both biology and math. •2 signed up for neither biology nor math. How many freshmen in total were surveyed? 0 34 O Not enough information were given. O 54 O 74

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