Researchers suspect that 18% of all high school students smoke at least one pack of cigarettes a day. At Wilson High School, with an enrolment of 300 students, a study found that 50 students smoked at least one pack of cigarettes a day. At a = 0.04, test the claim that 18% of all high school students smoke at least one pack of cigarettes a day.
Q: A dietician read in a survey that 85.36% of adults in the U.S. do not eat breakfast at least 3 days…
A:
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Given data in a science fair project Emily conducted an experiment in which she tested professional…
Q: Some commercial airplanes recirculate approximately 50% of the cabin air in order to increase fuel…
A: Considering the two sample proportions are indifferent, under the H0, the test statistic,…
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: From given data we have : n=331 x=158
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: (a) Obtain the proportion of correct responses that would be expected if the random guesses made…
Q: A cigarette manufacturer claims that one-eighth of the US adult population smokes cigarettes. In a…
A: Given: P = 18 = 0.125 n = 100 X = 5 α = 0.05 Formula Used: Test-statistic Z = p-PP(1-P)n
Q: Some commercial airplanes recirculate approximately 50% of the cabin air in order to increase fuel…
A: Given that the sample size is n=1104. Number of passengers who flew on planes that did not…
Q: increased incidence of squeaking. Assume that in one study of 145 individuals who received ceramic…
A:
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Given: Number of events (x) = 152 Number of trials (x) = 326
Q: Researchers are interested in whether drinking coffee can improve exam performance for college…
A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks a) Here our…
Q: A researcher hypothesized that children's cholesterol levels may be affected by educating their…
A: Solution: Let X be the cholesterol level. From the given information, x-bar = 185, S=19.5 and n=40.
Q: Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep.…
A: From the provided information, Sample size (n) = 339 From which 7 suffer from sleep apnea that is…
Q: Doctors claim that sticking to a low-fat diet is not enough to lower cholesterol levels of…
A: In order to test the Doctor's claim which states that the average cholesterol levels remain the same…
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Given:1. Emily conducted an experiment with 304 trials.2. She used a coin toss to select either her…
Q: a. Given that Emily used a coin toss to select either her right hand or her left hand, what…
A: a. When a coin is tossed there are two possible outcomes either right or left.
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: a. The answer i letter a is correct. Since the coin is place either in left or right hand, it gives…
Q: Hospital records show that 425 of the 850 patients who contracted a strain of influenza recovered…
A:
Q: One doctor claims that a person's diastolic blood pressure can be lowered if, instead of taking…
A: The random variable person's diastolic blood pressure follows normal distribution. There are two…
Q: Suppose we want to study the effect of smoking on lung capacity in women. Match the study to…
A: The observational studies are the one in which we only observe but not interfere or introduce…
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A:
Q: An experimenter investigated the effects of blue light exposure on people’s sleep quality.…
A: In the given research problem, there are two independent samples- Blue light and No Blue light. The…
Q: Please answer number 13.
A: It is given that 43% had no children, 18% are had one child, 18% are have two children, 21% have…
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Given Data Sample Size, n = 342 Number of successes, x = 156.0 Significance level,…
Q: Some commercial airplanes recirculate approximately 50% of the cabin air in order to increase fuel…
A: H0: pdo not recirculate − pdo recirculate = 0 H1:pdo not recirculate − pdo recirculate≠0
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Given Information: Probability (p) of a head or a tail when a coin is being tossed = 1/2 = 0.5…
Q: Can You Tell a Story About Your Parents? In a study, young adults in the US were asked to recall a…
A: (a) If the standard error for the distribution is 0.015, find a 95% confidence interval for the…
Q: Since the level of significance is 0.10 the critical value is 1.282 The test statistic is: (round to…
A: It is given that Population proportion, p = 0.6922 Favourable cases, X = 46 Sample size, n = 71…
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Given: Sample size n = 356 Selected sample x=167
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A:
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: a. If the touch therapists made random guesses, they would have a 50% chance of guessing correctly.…
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Sample size (n) = 342 Selected sample (x) = 161
Q: 3. A study in Men's Health magazine stated that 14% of men said they use exercise to reduce stress.…
A:
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: a. Since Emily used a random coin toss (either right or left), random guessing by the therapists…
Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Given information ,Sample size , n = 331Number of times the touch therapists were correct , X =…
Step by step
Solved in 3 steps with 2 images
- In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 310 trials, the touch therapists were correct 149 times. Complete parts (a) through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? (Round to three decimal places as needed.) c. Using Emily's sample results, construct a 95% confidence interval estimate of the proportion of correct responses made by touch therapists. |According to the Pew research center 65% of US adults believe that the government should play a larger role in addressing climate change. A random sample (SRS) of 80 US adults found that 56 US adults believe that the government should play a larger role in addressing climate change. Does this indicate that population proportion of US adults who believe that the government should play a larger role in addressing climate change is MORE THAN 65%? Given: a= 0.05 level 1. List your oH and aH: (symbols and words) 2. State and Check the conditions for the test: 3. Use the information in question: Identify the hypotheses being tested: Find your SE and test statistic by hand: 4. Use the information in question: State your conclusion given 05.0 level, in a complete sentence, in the context of the problem. 5. Use the information in question. Find the 95% confidence interval by hand using: Given z*=1.96In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 354 trials, the touch therapists were correct 170 times. Complete parts (a) through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? nothing (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? nothing (Round to three decimal places as needed.) c. Using Emily's sample results, construct a 95% confidence interval estimate of the proportion of correct…In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 312 trials, the touch therapists were correct 151 times. Complete parts (a) through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? (Round to three decimal places as needed.) c. Using Emily's sample results, construct a 90% confidence interval estimate of the proportion of correct responses made by touch therapists.On a particular night, a baseball stadium sells 60% of its seats, and of those, 15% do not end up showing up to the game. Assuming everyone present is sitting in a seat, what percentage of seats in the stadium are empty?A researcher wants to know whether children with ADHD tend to watch more TV than children who are not diagnosed with the disorder. To examine this, a researcher obtains a sample of n = 36 children (ages 8 to 12 years) who have been diagnosed with ADHD. Each child is asked to keep a journal recording how much time each day is spent watching TV. The average for the sample is M = 4.9 hours/day. Assume that the average TV-watching time for the general population of 8-to-12-year-old children is µ = 4.1 hours/day with σ = 1.8. Is ADHD in children associated with an increased amount of TV-watching?Historically, Olympic officials have reported testosterone levels in general should be u = 538 ng/dL, with o = 189, with x being normally distributed. Summer Olympic sprinters (n = 8) from the U.S. were tested for testosterone levels the morning after the opening ceremonies. Their sample mean was ng/dL. Do these data indicate that the sprinters had an overall average testosterone level greater than 538? Use a = .05. State a, H,, H1, p-value, rejection, or non-rejection, and be certain to interpret your results.In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 329 trials, the touch therapists were correct 157 times. Complete parts (a) through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? 0.5 (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? 0.477 (Round to three decimal places as needed.) c. Using Emily's sample results, construct a 95% confidence interval estimate of the proportion of correct responses made by touch therapists.Some commercial airplanes recirculate approximately 50% of the cabin air in order to increase fuel efficiency. The researchers studied 1100 airline passengers, among which some traveled on airplanes that recirculated air and others traveled on planes that did not recirculate air. Of the 515 passengers who flew on planes that did not recirculate air, 108 reported post-flight respiratory symptoms, while 112 of the 585 passengers on planes that did recirculate air reported such symptoms. Is there sufficient evidence to conclude that the proportion of passengers with post-flight respiratory symptoms differs for planes that do and do not recirculate air? Test the appropriate hypotheses using ? = 0.05. You may assume that it is reasonable to regard these two samples as being independently selected and as representative of the two populations of interest. (Use a statistical computer package to calculate the P-value. Use pdo not recirculate − pdo recirculate. Round your test statistic to two…An educator is interested in determining if the medium used for online classes, whether a smartphone or laptop/desktop, influences the time (hrs) that Grade 12 students spend in these classes. A random sample of 10 students who were using smartphones and another random sample of 10 students who were using laptop/desktop were interviewed and reported the following times they spend in their daily online classes: Smartphone 0 30230 1 5 4 3 Medium for Online Class Laptop/Desktop 2 7 3 3 0 3 1 3 15 Suppose the assumption of equality of variance is satisfied. Perform an appropriate test of hypothesis to determine if the average time spent online significantly differs between the students using these two mediums. Use a 5% level of significance.In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 303 trials, the touch therapists were correct 144 times. Complete parts (a) through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? c. Using Emily's sample results, construct a 90% confidence interval estimate of the proportion of correct responses made by touch therapists. d. What do the results suggest about the ability of touch therapists to select the…In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 307 trials, the touch therapists were correct 143 times. Complete parts (a) through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? 0.5 (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? (Round to three decimal places as needed.)SEE MORE QUESTIONSRecommended textbooks for youMATLAB: 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. FreemanMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons IncProbability and Statistics for Engineering and th…StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage LearningStatistics for The Behavioral Sciences (MindTap C…StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage LearningElementary Statistics: Picturing the World (7th E…StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSONThe Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. FreemanIntroduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman