Intro Stats, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780134210285
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 17.5, Problem 9JC
To determine
Find the hypothesis for this context.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Naini, Cobourne, McDonald and Donaldson (2008) reported that a specific ratio of height to face length of 1 to 8.5 tended to be rated as most attractive—almost exactly what Da Vinci’s idealized Vitruvian Man, predicts as “perfection” in the human form. For this study, we want to see if there is a relationship between a person’s height and head circumference. We get a random sample of 40 people and measure both their height and their head size to the nearest centimeter.
What test should you use and why?
A researcher wonders whether younger mothers have babies that are significantly heavier or
lighter than the population average of μ 7.25 pounds. The researcher collects data from N
= 35 babies who were born to mothers between the ages of 16 and 18. The average weight
for these babies was M = 7.15 pounds (SD = .6 pounds).
A recent study investigated the characteristics of teeth in an extinct species. The values belowshows the dentary depth of teeth (in millimeters) for a sample of 18 teeth. It is known that themean dentary depth of teeth in an extinct species, Species A, is 15 millimeters. Is thereevidence to indicate that the sample of 18 teeth come from an extinct species other thanSpecies A?18.25 19.41 19.48 15.72 16.17 19.21 15.54 17.16 13.5616.87 15.98 17.69 13.53 15.66 18.02 13.98 14.24 16.13
Chapter 17 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
Ch. 17.2 - A public broadcasting station plans to launch a...Ch. 17.2 - Prob. 2JCCh. 17.3 - Prob. 3JCCh. 17.3 - Prob. 4JCCh. 17.4 - Prob. 5JCCh. 17.4 - Prob. 6JCCh. 17.4 - Prob. 7JCCh. 17.4 - Prob. 8JCCh. 17.5 - Prob. 9JCCh. 17.5 - Recall the experiment comparing patients 4 weeks...
Ch. 17.5 - Prob. 11JCCh. 17 - Canada Suppose an advocacy organization surveys...Ch. 17 - Non-profits Do people who work for non-profit...Ch. 17 - Canada, deux The information in Exercise 1 was...Ch. 17 - Prob. 4ECh. 17 - Prob. 5ECh. 17 - Prob. 6ECh. 17 - Prob. 7ECh. 17 - Prob. 8ECh. 17 - Prob. 9ECh. 17 - Non-profits test Complete the analysis begun in...Ch. 17 - Prob. 11ECh. 17 - Prob. 12ECh. 17 - Prob. 13ECh. 17 - Athlete ages, again Using the summary statistics...Ch. 17 - Prob. 15ECh. 17 - Athlete ages, ninth inning The researchers in...Ch. 17 - Prob. 17ECh. 17 - Athlete ages, overtime Repeat the test you did in...Ch. 17 - Prob. 19ECh. 17 - Prob. 20ECh. 17 - Prob. 21ECh. 17 - Prob. 22ECh. 17 - Prob. 23ECh. 17 - Prob. 24ECh. 17 - Prob. 25ECh. 17 - Prob. 26ECh. 17 - Prob. 27ECh. 17 - Graduation The U.S. Department of Commerce...Ch. 17 - Prob. 29ECh. 17 - Carpal tunnel The painful wrist condition called...Ch. 17 - Prob. 31ECh. 17 - Prob. 32ECh. 17 - Ear infections A new vaccine was recently tested...Ch. 17 - Anorexia The Journal of the American Medical...Ch. 17 - Prob. 35ECh. 17 - Prob. 36ECh. 17 - Teen smoking A Vermont study published by the...Ch. 17 - Depression A study published in the Archives of...Ch. 17 - Birthweight The Journal of the American Medical...Ch. 17 - Politics and sex One month before the election, a...Ch. 17 - Prob. 41ECh. 17 - Prob. 42ECh. 17 - Pain Researchers comparing the effectiveness of...Ch. 17 - Gender gap Candidates for political office realize...Ch. 17 - Prob. 45ECh. 17 - Prob. 46ECh. 17 - Sensitive men In the same article from Exercise...Ch. 17 - Carbs Recently, the Gallup Poll asked 1005 U.S....Ch. 17 - Food preference GfK Roper Consulting gathers...Ch. 17 - Prob. 50ECh. 17 - Hot dogs In the July 2007 issue, Consumer Reports...Ch. 17 - Prob. 52ECh. 17 - Prob. 53ECh. 17 - Prob. 54ECh. 17 - Hot dogs, last one In Exercise 53, we saw a 90%...Ch. 17 - Third load of wash In Exercise 54, we saw a 98%...Ch. 17 - Prob. 57ECh. 17 - Prob. 58ECh. 17 - Prob. 59ECh. 17 - Prob. 60ECh. 17 - Commuting A man who moves to a new city sees that...Ch. 17 - Pulse rates A researcher wanted to see whether...Ch. 17 - Prob. 63ECh. 17 - New construction The house sales we looked at in...Ch. 17 - Cereal sugar The data below show the sugar content...Ch. 17 - Prob. 66ECh. 17 - Prob. 67ECh. 17 - Prob. 68ECh. 17 - Cholesterol and gender Are men or women at higher...Ch. 17 - Prob. 70ECh. 17 - Home runs 2016 American League baseball teams play...Ch. 17 - Prob. 72ECh. 17 - Prob. 73ECh. 17 - Prob. 74ECh. 17 - Prob. 75ECh. 17 - Ad campaign You are a consultant to the marketing...Ch. 17 - Prob. 77ECh. 17 - Thirsty? Researchers randomly assigned...Ch. 17 - Prob. 79ECh. 17 - Prob. 80ECh. 17 - Tees Does it matter what kind of tee a golfer...Ch. 17 - Golf again Given the test results on golf tees...Ch. 17 - Music and memory Is it a good idea to listen to...Ch. 17 - Rap Using the results of the experiment described...Ch. 17 - Prob. 87ECh. 17 - Prob. 88E
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- In the population of senior students at Shermer High School, the proportion who plan to attend college is 0.64. In a random sample of 100 students from this population, the proportion who plan to attend college is 0.75. We would call the value 0.64 a P-value. z-score. parameter statistic significance level.arrow_forwardA doctor wants to estimate the mean HDL cholesterol of all 20 to 29 year old females. How many subjects are needed to estimate the mean HDL cholesterol within 2 points with 99% confidence assuming s=19.4 based on earlier studies? Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affec the sample size required? How does the decrease in confidence affect the sample size required? A. The sample size is the same for all levels of confidence. B. Decreasing the confidence level decreases the sample size needed. C. Decreasing the confidence level increases the sample size needed.arrow_forwardThe z score length of a carrot is 1.5, what is the length of this carrot? what percentage of carrots that is longer than it?arrow_forward
- Find the raw score which corresponds to z=1.6?arrow_forwardResearchers wanted to measure the effect of alcohol on the development of the hippocampal region in adolescents. The researchers randormly selected 12 adolescents with alcohol use disorders. They wanted to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x= 8.49 and s = 0.8. Conduct an appropriate test at the a= 0.01 level of significance. Choose the correct hypotheses. Ho: 9.02 V9.02 Find the test statistic. to (Round to two decimal places as needed.) Find the P-value The P-value is (Round to three decimal places as needed.) What conclusion can be drawn? O A. Reject Ho. There is sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are greater than the normal volume of 9.02 cmarrow_forwardState the conclusion based on the results of the test. Nex qeSuOn The mean of the pressure required to open a certain valve is known to be = 6.4 psi. Due to changes in the manufacturing process, the quality-control manager feels that the average pressure has changed. The null hypothesis was rejected. Choose thee correct answer below. OA. There is not sufficient evidence that the mean of the pressure required to open a certain valve has changed. O B. The mean of the pressure has not changed. Oc. The mean of the pressure has changed. OD. There is sufficient ovidence that the mean of the pressure required to open a certain valve has changed. OE. There is sufficient evidence that the mean of the pressure required to open a certain valve has not changed. OF There is not suficient evidence that the mean of the pressure required to open a certain valve has not changed.arrow_forward
- "Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the wrinkle recovery angle (in degrees) for two types of treated fabrics: Permafresh Hylite 15 18 13 14 16 19 12 16 11 A manufacturer wants to know how large is the difference in mean wrinkle recovery angle. Give a 98% confidence interval for the difference in mean wrinkle recovery angle: [three decimal accuracy] [three decimal accuracy)arrow_forwardA researcher wants to know whether athletic women are more flexible than non - athletic women. For this experiment, a woman who exercised vigorously at least four times per week was considered "athletic". Flexibility is measured in inches on a sit & reach box. A researcher tested his claim using the following summary statistics: Athletic women Non-athletic women n = 50 * = 5.0 inches s=1.4 inches Assume that all conditions for testing have been met. t = 1.626; p = 0.057 ; At the 1% significance level, state your decision regarding the null hypothesis and your conclusion about the original claim. n = 30 * = 4.6 inches s= 0.8 inches O A. Fail to reject the null hypothesis; there is not strong enough evidence to suggest that athletic women are more flexible, on average, than non-athletic women. O B. Reject the null hypothesis; there is strong evidence to suggest that non-athletic women are more flexible, on average, than athletic women. OC. Fail to reject the null hypothesis; there is…arrow_forwardHow heavy a load (pounds) is needed to pull apart pieces of Douglas fir 4 inches long and 1.5 inches square? Students doing a laboratory exercise sample 20 pieces of wood and find an average load capacity of 30,841 pounds. We are willing to regard the wood pieces prepared for the lab session as an SRS of all similar pieces of Douglas fir. Engineers also commonly assume the characteristics of materials vary normally. Suppose that the strength of pieces of wood like these follow a normal distribution with a population standard deviation of 3,000 pounds (As you can see all three necessary assumptions are met). a. Assuming that all evergreen wood has a known "load" capacity average of 30,000 pounds. Make a two-sided hypothesis (null and alternative statement) about Douglas Fir "load" capacity compared to the overall average. b. Apply the formula for finding our test statistic (show your work or describe the process) Specifically, use the formula for the z-statistic (pasted below and on…arrow_forward
- A golf club currently has 350 members that pay annual dues to play golf on the course. Historical records show that 39% of the members use the course at least once a week during the summer season. To verify this, a random sample of 100 members was selected. Complete parts a through d below. Question content area bottom Part 1 a. Calculate the standard error of the proportion. σp=enter your response here (Round to four decimal places as needed.) Part 2 b. What is the probability that 33 or more members from the sample used the course at least once a week? P(33 or more members)=enter your response here (Round to four decimal places as needed.) Part 3 c. What is the probability that between 30 and 40 members from the sample used the course at least once a week? P(Between 30 and 40 members)=enter your response here (Round to four decimal places as needed.) Part 4 d. If 50 members from the sample used the course at least once a week, does this support the…arrow_forwardJllustration 36. A collar manufacturer is considering the production of a new style of collar Vio attract young men. The following statistics of neck circumferences are available based upon measurements of a typical group of college students: Mid-value (in inches) : 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 016.0 No. of students 02 : 16 36 60 76 37 A 18 308-012 Compute the standard deviation and use the criterion X+30 where o is the standard deviation and X is the arithmetic mean to determine the largest and smallest size of the collar he chould make in order to meet the needs of practically all the customers bearing in mind that collars are worn on an average 1 inch longer than neck size.arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Hypothesis Testing using Confidence Interval Approach; Author: BUM2413 Applied Statistics UMP;https://www.youtube.com/watch?v=Hq1l3e9pLyY;License: Standard YouTube License, CC-BY
Hypothesis Testing - Difference of Two Means - Student's -Distribution & Normal Distribution; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=UcZwyzwWU7o;License: Standard Youtube License