A hospital director believes that 52% of the lab reports contain errors. A sample of 350 tubes found 161 errors. Is there sufficient evidence at the 0.05 level to refute the hospital director's claim? State the null and alternative hypotheses for the above scenario.
Q: Consider a drug testing company that provides a test for marijuana usage. Among 256 tested subjects,…
A: The sample size: Number of wrong test results: The level of significance: The claim of the test is…
Q: claimed that 3% of professional golfers are left-handed. Believing this claimed value is incorrect,…
A: Given that Level of significance =alpha =0.05 And P-value =0.01
Q: In a study of the accuracy of fast food drive-through orders, one restaurant had 34 orders that were…
A: Given: n= 392 ,x= 34 p= 0.1 ,significance level(∝)= 0.01 p̂= 34 / 392 define hypothesis;- Null…
Q: A statistics student believes that black cars are less likely to receive tickets for moving…
A: It is given that the P-value is 0.24.
Q: the proportion of wildfires caused by humans in the south lower than the proportion of wildfires…
A:
Q: Based on information from a large insurance company, 68% of all damage liability claims are made by…
A: Given that Sample size n =54 Favorable cases x =41
Q: of fast food drive-through orders, one restaurant had 36 orders that were not accurate among 346…
A: Given: x=36, n=346, p0=0.10 The null and alternative hypothesis is given as: H0:p=0.10HA:p≠0.10 The…
Q: In a program designed to help patients stop smoking, 216 patients were given sustained care, and…
A:
Q: The critical z-value for an 85% two tailed hypothesis test is a. 0.8023 b. 1.44 c. 1.04 d.…
A: For two tailed test we use critical z value at α2 Since here α=15% Therefore here we calculate…
Q: Suppose 212 subjects are treated with a drug that is used to treat pain and 52 of them developed…
A: Correct answer: Option (B)
Q: Suppose 233subjects are treated with a drug that is used to treat pain and 50 of them developed…
A: One sample proportion: One sample proportion test is used to compare the proportion of values in…
Q: Two different simple random samples are drawn from two different populations. The first sample…
A:
Q: n a study of the accuracy of fast food drive-through orders, one restaurant had 36 orders that were…
A:
Q: In a random sample of 500 children from Illinois, 143 were undernourished. Use these sample data to…
A: Assumptions: The data are selected randomly. If np≥ and nq≥10 then the distribution follows…
Q: newsletter publisher believes that more than 85% of their readers own a personal computer. Is there…
A: Given data is appropriate for testing of hypothesis for z-test for single proportions (n>30) It…
Q: In January 2010, the Pew Research Center did a similar survey about the 2010 Census, reporting that…
A: Given information: p=0.64 p^=0.59 The researcher believe that percentage may have decreased.…
Q: In a random sample of 500 children from Illinois, 143 were undernourished. Use these sample data to…
A: Given that n=500 and p=0.5.
Q: In April of 2011, the unemployment rate in Canada was reported to be 7.7%. Suppose that Statistics…
A: One sample proportion test is used to compare the significance difference between sample proportion…
Q: Consider a drug testing company that provides a test for marijuana usage. Among 250 tested subjects,…
A: The claim is that less than 10 percent of the test results are wrong.
Q: In a survey of 240 students in an elementary statistics class at the University of California-Davis…
A: Given that : n=240 x=19 (Left handed) x=221 (Right handed) By using one sample…
Q: State the null and alternative hypotheses for the above scenario.
A: Population proportion of the test tubes contains error P = 68% =0.68 Sample of size n= 100 with…
Q: A manufacturer of banana chips would like to know whether its bag filling machine works correctly at…
A: In hypothesis testing, we start with a null hypothesis and an alternative hypothesis. In this case,…
Q: reviously, 5.5% of workers had a travel time to work of more than 60 minutes. An urban economist…
A:
Q: A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly…
A: In this case, the null hypothesis (H0) is that the bag filling machine works correctly, meaning the…
Q: A newsletter publisher believes that over 68%68% of their readers own a personal computer. Is there…
A: Null hypothesis: Alternative hypothesis:
Q: According to a study in a previous year, 55.0% of households nationwide used natural gas for heating…
A: Given: n= 3300 ,x= 1848.0 p= 0.55 ,significance level(∝)= 0.05 p̂= 1848.0 / 3300
Q: A publisher reports that 58% of their readers own a particular make of car. A marketing executive…
A: The claim is that the percentage is actually different from the reported percentage.
Q: s the proportion of wildfires caused by humans in the south lower than the proportion of wildfires…
A: Solution: Given information: n1= 562 Sample size of wildfires in south n2= 548 Sample size of…
Q: QUESTION 6 Test the claim that the proportion of people who are confident is smaller than 90% at the…
A:
Q: A newsletter publisher believes that less than 32% of their readers own a laptop. For marketing…
A: Decision : Reject the null hypothesis.
Q: In a study of the accuracy of fast food drive-through orders, one restaurant had 34orders that were…
A: Let p be the population proportion of the orders that were not accurate . Claim : The rate of…
Q: A headline read, "More Than Half of Americans Say Federal Taxes Too High." The headline was based on…
A: We have given that Sample size N=1027 , and Favorable cades X=539 Sample proportion p^=X/N
Q: A newsletter publisher believes that 68% of their readers own a Rolls Royce. Is there sufficient…
A: Given data, p=68%=0.68 α=0.02
Q: A random sample of 876 births included 430 boys. Use a 0.05 significance level to test the claim…
A: Given that p = 50.7% , n = 876
Q: In April of 2011, the unemployment rate in Canada was reported to be 7.3 %. Suppose that Statistics…
A:
Q: USA Today reported that about 47% of the general consumer population in the United States is loyal…
A: We have given that the hypothetical proportion p0=0.47, sample size 1002 and favourable cases X =…
Q: In a study of the accuracy of fast food drive-through orders, one restaurant had 34 orders that…
A: In a study of the accuracy of fast food drive-through orders, one restaurant had 34 orders that…
Q: Suppose the results indicate that the null hypothesis should not be rejected; thus, it is possible…
A: Type II error: Failing to reject the null hypothesis, when it is false. Here, it is given that type…
Q: A hospital director believes that 46% of the lab reports contain errors. A sample of 250 tubes found…
A: In hypothesis testing, we start by stating the null hypothesis (H0) and the alternative hypothesis…
Q: A company specializing in parachute assembly claims that its main parachute failure rate is at most…
A: accept Ho Reject Ho Ho true correct conclusion type I error Ho false type II error correct…
Q: April of 2011, the unemployment rate in Canada was reported to be 7.4%. Suppose that Statistics…
A: Given n=1000 Pcap=0.061 Significance level=0.01
Q: Suppose a hypothesis test was performed with a level of significance of 0.05. Then if the null…
A: Level of significance is the type 1 error which is rejecting the true Null Hypothesis. So here the…
Q: A published report claims that 35% of college students have used an online dating site or app.…
A:
Q: Suppose 206 subjects are treated with a drug that is used to treat pain and 54 of them developed…
A: The following information has been provided: The population proportion is p=0.20. The sample size is…
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- According to a study in a previous year, 55.0% of households nationwide used natural gas for heating during a year. Recently, a survey of 3,200 randomly selected households showed that 56.0% used natural gas. Use a 0.05 significance level to test the claim that the 55.0% national rate has changed. Formulate the null and alternative hypotheses. Choose the correct answer below. O A. Ho: p=0.55 H₂: p 0.55 OD. Ho: p=0.55 H₂: p=0.55 rcesIn a recent poll 1049 randomly selected adults were asked whether they approve of labor unions; 62% said yes. In 1936, about 65% of adults approved of labor unions. At the 1% significance level, do the data provide sufficient evidence to conclude that the percentage of adults who approve of labor unions has decreased since 1936? Use the one-proportion z-test to perform the appropriate hypothesis test, after checking the conditions for the procedure. What are the hypotheses for the one-proportion z-test? Ho: p=D: Hạ: p U (Type integers or decimals.) What is the test statistic? z= (Round to two decimal places as needed.) Identify the critical value(s). (Round to three decimal places as needed.) What is the correct conclusion for the hypothesis test? O A. Do not reject Ho; the data do not provide sufficient evidence to conclude that the percentage of adults who approve of labor unions has decreased since 1936. O B. Reject Hn; the data do provide sufficient evidence to conclude that the…Suppose 202 subjects are treated with a drug that is used to treat pain and 50 of them developed nausea. Use a 0.05 significance level to test the claim that more than 20 % of users develop nausea. A.dentify the null and alternative hypotheses for this test. B. Identify the P-value for this hypothesis test. C.Identify the conclusion for this hypothesis test.(reject or fail to reject and why?) D.Does the accuracy rate appear to be acceptable? (is there or is there not sufficent evidance to reject the claim and why?)
- A random sample of 873 births included 434 boys. Use a 0.10 significance level to test the claim that 50.7% of newborn babies are boys. Do the results support the belief that 50.7% of newborn babies are boys? Identify the null and alternative hypotheses for this test. Choose the correct answer below. OA. H₂: p=0.507 H₁: p=0.507 OB. Ho: p=0.507 H₁: p0.507 OD. Ho: p*0.507 H₁: p=0.507 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is (Round to three decimal places as needed.) Identify the conclusion for this hypothesis test. OA. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that 50.7% of newborn babies are boys. OB. Reject Ho. There is sufficient evidence to warrant rejection of the claim that 50.7% of newborn babies are boys. OC. Fail to reject Ho. There is not sufficient…In a study of the accuracy of fast food drive-through orders, one restaurant had 32 orders that were not accurate among 353 orders observed. Use a 0.05 significance level to test the claim that the rate of inaccurate orders is equal to 10%. Does the accuracy rate appear to be acceptable? Identify the null and alternative hypotheses for this test. Choose the correct answer below 1. Identify the null and alternative hypotheses for this test. Choose the correct answer below. 2. Identify the test statistic for this hypothesis test. 3.Identify the P-value for this hypothesis test. 4.Identify the conclusion for this hypothesis test.USA Today reported that about 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of 1007 Chevrolet owners and found that 482 said they would buy another Chevrolet. Does this indicate that the population proportion of consumers loyal Chevrolet is more than 47%? Use a = 0.01. (a) What is the level of significance? State the null and alternate hypotheses. O Ho: P = 0.47; H,: p 0.47 O Ho: p > 0.47; H,: p = 0.47 O Ho: p = 0.47; H1: p + 0.47 (b) What sampling distribution will you use? O The Student's t, since np 5 and ng > 5. O The standard normal, since np 5 and ng > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.) (c) Find the P-value of the test statistic. (Round your answer to four decimal places.) Sketch the sampling distribution and show the area corresponding to the P-value.
- The U.S. Postal Service (USPS) is faced with the issue of a large portion of mail (letters and packages) that cannot be delivered because of an illegible or non-existent address. USPS would like to find out if there is any evidence that the proportion of undeliverable mail has significantly decreased since last year when it was 6%. Which of the following are the correct null and alternative hypotheses for this test? Select one: a. Ho: p = 0.06 versus Ha:p> 0.06 b. Ho: p 0.06 ge Next page Moodle Accessibility Specification Coastal Carolina University (CCU) does not discriminate on the basis of race, color, religion, sex, sexual orientation, genc national origin, age, genetic information, mental or physical disability, or status as a disabled or Vietnam-era veteran in it programs, activities or employment practices. For more information related to discrimination, please contact Title IX, Titl office phone 843-349-2382: FEN email eenarnastal adur or thel Dent of Education office for…A newsletter publisher believes that more than 79% of their readers own a personal computer. Is there sufficient evidence at the 0.02 level to substantiate the publisher's claim? State the null and alternative hypotheses for the above scenario.In a program designed to help patients stop smoking, 213 patients were given sustained care, and 83.6% of them were no longer smoking after one month. Use a 0.05 significance level to test the claim that 80% of patients stop smoking when given sustained care. Identify the null and alternative hypotheses for this test. Choose the correct answer below. A. H0: p=0.8 H1: p<0.8 B. H0: p=0.8 H1: p≠0.8 Your answer is correct. C. H0: p≠0.8 H1: p=0.8 D. H0: p=0.8 H1: p>0.8 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is- The p-value- Reject Ho?
- Previously, 10.4% of workers had a travel time to work of more than 60 minutes. An urban economist believes that the percentage has increased since then. She randomly selects 75 workers and finds that 16 of them have a travel time to work that is more than 60 minutes. Test the economist's belief at the a = 0.1 level of significance. What are the null and alternative hypotheses? 0.104 versus H1: p Ho: p P = (Type integers or decimals. Do not round.) > 0.104 %3D Because npo (1- Po) 10, the normal model be used to approximate the P-value. %3D (Round to one decimal place as needed.)A hospital director believes that above 55% of the lab reports contain errors and feels an audit is required. A sample of 120 reports found 72 errors. Is there sufficient evidence at the 0.02 level to substantiate the hospital director's claim? State the null and alternative hypotheses for the above scenario.Two different simple random samples are drawn from two different populations. The first sample consists of 40 people with 20 having a common attribute. The second sample consists of 1800 people with 1291 of them having the same attribute. Compare the results from a hypothesis test p1=p2 (with a 0.05 significance level) and a 95% confidence interval estimate of p1-p2. What are the null and alternative hypotheses for the hypothesis test?
