MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
expand_more
expand_more
format_list_bulleted
Related questions
Question
A television station wishes to study the relationship between viewership of its 11 p.m. news program and viewer age (18 years or less, 19 to 35, 36 to 54, 55 or older). A sample of 250 television viewers in each age group is randomly selected, and the number who watch the station’s 11 p.m. news is found for each sample. The results are given in the table below.
| Age Group | |||||
| Watch 11 p.m. News? |
18 or less | 19 to 35 | 36 to 54 | 55 or Older | Total |
| Yes | 49 | 59 | 61 | 84 | 253 |
| No | 201 | 191 | 189 | 166 | 747 |
| Total | 250 | 250 | 250 | 250 | 1,000 |
(a) Let p1, p2, p3, and p4 be the proportions of all viewers in each age group who watch the station’s 11 p.m. news. If these proportions are equal, then whether a viewer watches the station’s 11 p.m. news is independent of the viewer’s age group. Therefore, we can test the null hypothesis H0 that p1, p2, p3, and p4 are equal by carrying out a chi-square test for independence. Perform this test by setting α = .05. (Round your answer to 3 decimal places.)
(b) Compute a 95 percent confidence interval for the difference between p1 and p4. (Round your answers to 3 decimal places. Negative amounts should be indicated by a minus sign.)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 3 steps with 4 images
Knowledge Booster
Similar questions
- A researcher randomly purchases several different kits of a popular building toy. The following table shows the number of pieces in each kit in the sample. Find the range of the data. Building Toy Pieces 165 50 270 355 355 50 109 301 270 114 175 495 Copy Dataarrow_forwardConsider the following data. Step 2 of 3: Determine the median of the given data. Answer How to enter your answer (opens in new window) 5, 12, 5, 12, 5, – 12, -7arrow_forwardThe boxplots below represent movie run-times (length of a movie in minutes) for movies that have been rated by the Motion Picture Associate of America as R, PG-13, PG, and G. Which movies have the largest variety in typical run-time? 80 R PG-13 PG B G 000 0 0 0 100 120 140 160 180 Runtime (in minutes) It's a tie between R and PG movies because they had the same median. PG-13 because it has the widest whiskers. PG-13 because it has the largest IQR. R because it has the most outliers.arrow_forward
- A researcher surveys a sample of n = 20 college students and asks each person to identify their favorite movie. If the data were organized in a frequency distribution table, what would be included in the last column?arrow_forwardgiven data: 2.1, 2.8, 3.7, 4.1, 4.6, 5.8, 6.3, 7.4, 8.2, 8.5, 9.6, 10.1, 10.3, 10.9, 11.0, 11.8, 12.4, 13.6, 13.9, 14.3, 14.6, 15.5, 15.9, 16.7, 16.9 Can I get help with... 6a) Two data sets both have a mean of 50. One has a standard deviation of 2 and the other has a standard deviation of 10. Describe what is different about these two data sets. b) Since the mean and the median both describe the same characteristic, explain why they are not always the same. (no formulas) c) When and why would the mean be better to use than the median?arrow_forwardA survey was given to 18 students. One question asked about the one-way distance the student had to travel to attend college. The results, in miles, are shown in the following table. Use the median procedure for finding quartiles to find the first, second, and third quartiles for the data. Distance Traveled to Attend College 30 36 8 12 38 72 4 24 26 26 6 40 50 26 76 14 12 32 Q1 = Q2 = Q3 =arrow_forward
- a survey was given to 18 students. one question asked about the one-way distance the student had to travel to attend college. the results, in miles, are shown in the following table. use the median procedure for finding quartiles to find the first, second and third quartiles for the data.arrow_forwardIn Exercises 33 to 36, determine whether or not the conditions for using two-sample t procedures are met. 33. Shoes How many pairs of shoes do teenagers have? To find out, a group of AP® Statistics students conducted a survey. They selected a random sample of 20 female students and a separate random sample Females 333 95 4332 66 410 8 9 100 7 0 0 4455 WW~~ 1 1 2 2 2 Males 4 3 555677778 0000124 3 58 Key: 22 represents a male student with 22 pairs of shoes.arrow_forwardFind the mean, median and mode of the given sample. How would the mean, and median change if the highest salar is omitted? $250,00, $300,000, $350147, $232,425, $360,000, $1,231,421, $810,000, $229,000arrow_forward
- A researcher randomly purchases several different kits of a popular building toy. The following table shows the number of pieces in each kit in the sample. Find the median of the data. Building Toy Pieces 160 45 265 350 150 45 104 296 265 109 170 208arrow_forwardHere is a set of sample data. 25 53 10 75 41 60 51 88 18 99 11 94 79 100 36 65 27 35 3 69 93 Base on the data above, identify the 5 number summary ? ,? ?,? ,? ,arrow_forwardWe have presented a “data scenario.” In each case, decide which type of grouping (single-value, limit, or cutpoint) is probably the best. Number of Cars. The number of automobiles per familyarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning 
Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSON
The Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. Freeman
Introduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman