A study was conducted to determine the effectiveness of helichrysum oil for allergies. 31 of the 48 subjects who were given helichrysum oil still developed symptoms of allergies after taking the oil. In a group who were given plecebos, 87 of the 108 subjects still developed symptoms of allergies. Use a 90% confidence level to test the claim that helichrysum oil has an effect on allergy symptoms. Is this a right, left or two tailed test? What is the P-value? write a conclusion

Q: Dr. Mackintosh believes a new olfactory therapy would be more successful in promoting weight loss…

A: We have to answer questions based on hypothesis testing.

Q: A coworker claims that Skittles candy contains equal quantities of each color (purple, green,…

A: The question is about categorical data analysis.Given :Randomly selected no. of " S " candy ( n ) =…

Q: A poll was conducted to investigate opinions about global warming. The respondents who answered yes…

A: Data is given for the respondents who answered yes when asked if there is solid evidence that the…

Q: A new drug to treat psoriasis has been developed and is in clinical testing. Assume that those…

A: The test hypotheses are given below: Null hypothesis: H0:p1=0.02,p2=0.77,p3=0.16,p4=0.05 Alternative…

Q: a survey by Bea et.al., it was found that 218 of 1,062 urban residents had a history of allergic…

A:

Q: The table below refers to a case control study on the association between sulfones and streptomycin…

A: Clinical ChangeDegree of InfiltrationWorse(-1)Stationary(0)Slight Improvement(1)Moderate…

Q: Find the relative risk for the headache data.

A: here use given information , For treatment group n = 2142 x= 22 (reported headache)   for control…

Q: OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerous because it is…

A: Solution:Given that,Level of significance = 0.05Sample size(x) = 52Total (n) =227

Q: A poll was conducted to investigate opinions about global warming. The respondents who answered yes…

A: Given  Test statistic=0.474, level of significance ɑ=0.01

Q: Do sports drinks help prevent cramps in endurance sports? At the end of a marathon, officials will…

A: Observational study: In observational study, the individuals of the study are observed by the…

Q: Inadequate exposure to outdoor lighting conditions may increase the risk of myopia in children. A…

A:

Q: A poll was conducted to investigate opinions about global warming. The respondents who answered yes…

A: Df = (2-1)(3-1) = 2 using excel function, CHISQ.INV.RT(0.05,2), critical value = 5.991 Since, test…

Q: e source in the sportswear company ad for performax?" On a 7-point scale. Higher values indicated…

A: ad source  N SD Sample mean  wall street journal  n1 =66 s1 =1.5 x¯1=4.77 National Enquirer…

Q: randomized, double-blind, placebo-controlled study evaluated the effect of the herbal remedy…

A: For the echinacea group: Sample size (n1): 337 Mean severity score (x̄1): 6.0 Standard deviation…

Q: A recent study randomly selected women from various countries around the world and collected…

A:

Q: A researcher has participants expecting to receive either painful or mild electrical shocks during a…

A: Usually in survival analysis studies we can use both parametric and non-parametric statistics. For…

Q: A group of health conscious researchers were interested in ways to lower blood pressure.  The study…

A: It is given that there are three intervention types on post-treatment blood pressure with each of 30…

Q: In conducting an ANOVA, if the independent variable has an effect on the dependent variable then…..

A: In an ANOVA, the F value is defined as F = MSbetween/MSwithin

Q: A researcher conducts an independent-measures study examining how the brain chemical serotonin is…

A: A. Null and alternate hypotheses: The investigator is specifically interested to test whether the…

Q: Find the standard error for comparing the means.  Construct a 95% confidence interval for the…

A: The sample mean of the body dissatisfaction assessment score was 13.4 (s=7.9) for 15 lean sports…

Q: A recent study investigated whether the number of positive health behaviors (e.g., exercising,…

A: The formulas for MS regression and MS residuals are given by :…

Q: The drug OxyContin (oxycodone) is used to treat pain, but it is dangerous because it is addictive…

A: Given Information :  The drug OxyContin (oxycodone) is used to treat pain, but it is dangerous…

Q: A new drug to treat psoriasis has been developed and is in clinical testing. Assume that those…

A: State the hypotheses. The first step is to state the null hypothesis and an alternative hypothesis.…

Q: A clinical trial is planned to compare an experimental medication designed to lower blood pressure…

A:

Q: A poli was conducted to investigate opinions about global warming. The respondents who answered yes…

A:

Q: As men age, their testosterone levels gradually decrease. This may cause a reduction in energy, an…

A: Here, we are given a study of 237 men aged 60 to 80 years with low or low normal levels of…

Q: Step 1 of 3 :   State the null and alternative hypotheses for the test. Fill in the blank below.…

A: Given : n1= 500 n2= 250 significance level, 0.05 sample proportion p̂1…

Q: Indicate explanatory and response variables. Response variable. Explanatory variable. Class…

A: An explanatory variable is a type of variable that is used to explain the data . This type variable…

Q: What is the distinguishing feature of a case-control study such as this? An epidemiologist performed…

A: We are interested in the how this study is performed.

Q: Identify the null and alternative hypotheses. Compute the test statistic. (round 3 decimal places)…

A:

Q: A clinical trial is conducted comparing a new pain reliever for arthritis to a placebo. Participants…

A: 1) From the provided information, The hypotheses can be constructed as follow: Null hypothesis: H0:…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.