Rhino viruses typically cause common colds. In a test of the effectiveness of​ echinacea, 35 of the 41 subjects treated with echinacea developed rhinovirus infections. In a placebo​ group, 82 of the 98 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts​ (a) through​ (c) below.

Q: A doctor is concerned that nausea may be a side effect of Tamiflu, but is not certain because nausea…

A:

Q: In a poll of 1000 adults, 520 said they felt vulnerable to identity theft. Use a 0.05 significance…

A: Given information Total adults(n) = 1000 No of people feeling vulnerable(x) = 520

Q: Suppose 221 subjects are treated with a drug that is used to treat pain and 53 of them developed…

A:

Q: In Cleveland, a sample of 73 mail carriers showed that 10 had been bitten by an animal during one…

A: Note: Hi there! Thank you for posting the question. To avoid the plagiarism issue we have used the…

Q: A random sample of n1 = 300 voters registered in the state of California showed that 143 voted in…

A: Note: Since we only answer up to 3 subparts , we will answer the first 3. Please resubmit the…

Q: A hospital found out that there is a higher incidence of food poisoning in adults than in children.…

A: Given that, A hospital found out that there is a higher incidence of food poisoning in adults than…

Q: In a clinical study of an allergy drug 98 of the 202 subjects reported experiencing significant…

A:

Q: Does owning an indoor dog really help bring down borderline high systolic blood pressure? To answer…

A: Solution: 2. State the hypotheses. Null hypothesis: H0:µD≤0 That is, owing a pet will not reduce the…

Q: The sales rep of a waterbed claims that 25% of the Filipino died because of cardiovascular diseases.…

A:

Q: A researcher is interested in factors related to academic performance of students.She hypothesized…

A: Given: Number of categories of academic majors (c) = 4 Test value = 2.75 p value = 0.283

Q: A sample of 20 engineers employed with a company for three years have been tested on a management…

A: Null Hypothesis; H0: The means of the three testing programs are equal. Alternative Hypothesis: H1:…

Q: In a recent poll, 1095 randomly selected adults were asked whether they approve of labor unions; 65%…

A: The null and alternate hypothesis are H0 : p=0.69Ha : p<0.69 The test statistics is…

Q: A doctor is concerned that nausea may be a side effect of Tamiflu, but is not certain because nausea…

A: From the provided information, Population proportion (p) = 0.25 Sample size (n) = 2099 Out of which…

Q: Are blonde female college students more likely to have boyfriends than brunette female college…

A: The null hypothesis is a simple statement about the value of the population parameter which is…

Q: Rhino viruses typically cause common colds. In a test of the effectiveness of​ echinacea, 43 of the…

A:

Q: • In a 2019 survey of 560 college students, 171 said they used illegal drugs during the previous…

A:

Q: A, B, C

A: a.The two populations are ‘all the students who purchase lecture notes’ and ‘all the students who do…

Q: 4. For migraine sufferers, is there an association between gender and relief from a migraine with a…

A: Given: α=0.01

Q: The recidivism rate for convicted sex offenders is 14%. A warden suspects that this percent is…

A:

Q: The recidivism rate for convicted sex offenders is 15%. A warden suspects that this percent is…

A:

Q: 62% replied in the affirmative. At the 1% significance level, do the data provide sufficient…

A: Given : n=1125 , p-hat=0.62 , p0=2/3 , α=0.01 Our aim is to test weather the less than 2/3 of all…

Q: Suppose 221 subjects are treated with a drug that is used to treat pain and 52 of them developed…

A:

Q: 2. Of 150 adults who tried a new peach-flavored peppermint patty, 87 rated it excellent. Of 200…

A: Given data of 150 adults who tried a new peach flavored peppermint patty 87 rated it excellent of…

Q: In a winter of an epidemic flu, the parents of 2000 babies were surveyed by researchers at a…

A: We have to perform test for difference in proportions.

Q: In a recent poll, 800 voters were randomly sampled and asked whether they would approve of the…

A: From the provided information, Sample size of voters (n) = 800 Out of which 450 voters approved of…

Q: In a survey, 716 out of 1132 randomly selected adults in the United States said that they use cell…

A:

Q: A doctor is concerned that nausea may be a side effect of Tamiflu, but is not certain because nausea…

A: Given: n=2422x=666p=0.30α=0.01

Q: a study is conducted to access the impact of caffeine consumption, smoking, alcohol consumption, and…

A: Given data, p=40%=0.4 n=8 Let X be event that they consume caffiene and smoke. P(X<=6)=?

Q: Are blonde female college students more likely to have boyfriends than brunette female college…

A: Given : p1^ = x1n1      = 389637      = 0.6107 p2^ = x2n2      = 342630      = 0.5429

Q: company to determine if the company’s new medicine was effective after two days.

A: Given : n1=120 , n2=280 , X1=29 , X2=56 ,  α=0.10 The estimates of the sample proportions are ,…

Q: In a clinical study of an allergy drug, 108 of the 200 subjects reported experiencing significant…

A: Solution: Note: Hello! As you have posted 2 different questions, we are answering the first question…

Q: Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 42 of the…

A: Provided information is, In the test of effectiveness of echinacea , it is claimed that echinacea…

Q: A computer manufacturer believes that the proportion of hardware malfunctions is different in humid…

A: Ho: the evidence support the computer manufacturer's claim at the 10% significance level. H1: the…

Q: Suppose a study reported that the average persin watched 3.37 hours of television per day. a random…

A: Solution: Given information: n= 15 Sample size  μ= 3.37  Population mean

Q: A study is made of residents in Las Vegas and its suburbs concerning the proportion of residents…

A:

Q: what is the test statistic value for this problem? a.0.28 b.-38 c.none of the above d. 0.58…

A: According our policy we can answer only first three subpart for remaining please repost the…

Q: The US Centers for Disease Control and Prevention said about 72 million Americans—nearly one out of…

A: There is some probability of Type I error in each hypothesis testing that is called test-wise alpha…

Q: In a poll of 1000 adults, 520 said they felt vulnerable to identity theft. Use a 0.05 significance…

A:

Q: Question 20

A: From the provided information, The hypotheses can be constructed as: Null hypothesis: H0: p = 0.38…

Q: A doctor is concerned that nausea may be a side effect of Tamiflu, but is not certain because nausea…

A: p = 0.25 Sample proportion = 490/2099 = 0.23 n = 2099

Q: e the flu. She researched some past studies, and found that about 25% of people who get the flu and…

A: The sample proportion is, The following null and alternative hypotheses need to be tested: Ho: p =…

Q: A doctor is concerned that nausea may be a side effect of Tamiflu, but is not certain because nausea…

A:

Q: US Universities found that 72% of people are concerned about the possibility that their personal…

A:

Q: A doctor is concerned that nausea may be a side effect of Tamiflu, but is not certain because nausea…

A: Dear Student, As per the guideline I can solve only the first three subparts, Kindly repost the…

Q: 13% of all Americans suffer from sleep apnea. A researcher suspects that a lower percentage of those…

A: Since we only answer up to three sub-parts, I will answer the first three sub part. Please resubmit…

Q: Suppose a study reported that the average personn watched 3.37 hours of television per day. a random…

A: We assume the population is normally distributed.

Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…

A: The level of significance is 0.01.

Q: A study reporting that college students who are on Facebook (or have it running in the background)…

A: Given information: The data represents the grades of Facebook users with non-users for middle school…

Q: 4. In a poll of 1018 adults, it was found that 22% smoked cigarettes in the past week. Use a 0.05…

A:

Q: In a previous poll, 29 % of adults with children under the age of 18 reported that their family ate…

A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.