A sample of 1200 adults revealed that 115 of them are left-handed. Test the claim with a significance level of 0.05 that 15% of all adults are left-handed. a) identify the claim, the null hypothesis, and the alternative hypothesis? b) Which type of test will be used? c) What critical values are there? d) What is the value of the test statistic? e) What is the decision? f) What is the conclusion?

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A: From the provided information, Sample size (n) = 653 Sample proportion (p̂) = 0.59 Level of…

Q: The p-value for a hypothesis test turns out to be 0.01251. At a 2% level of significance, what is…

A: The p-value for a hypothesis test is 0.01251.

Q: A nutritionist believes that 10% of teenagers eat cereal for breakfast. To investigate this claim,…

A: Suppose that p is the population proportion of teenagers, who eat cereal for breakfast.

Q: B. Identify the test statistic. ____   b2. Identify the​ P-value. ___   C. State the final…

A: The observed value (Oi) is: Born in Jan Feb Mar Apr May Jun Jul Aug Sep Oct…

Q: Remedial Disorder yes no 23 78 none dysgraphia 25 75 ADHD 20 22 a) Select and compute the…

A: Note: As per our company guidelines, we are supposed to answer only first three sub-parts. Kindly…

Q: A simple random sample of size n 200 drivers with a valid driver's license is asked if they drive an…

A: Solution: Given information:  n= 200 Sample size of drivers  x = 122 drivers drive an American made…

Q: 13) A poll of 1,068 adult Americans reveals that 48% of the voters surveyed prefer the Democratic…

A:

Q: Perform the following hypothesis test of a proportion: HO: p = 0.125 HA: p 0.125 The sample…

A:

Q: Assume that you plan to use a significance level of a = 0.05 to test the claim that p1 = P2. Use the…

A: The sample size of PG-rated movies, n1=50 The ticket sales are 41%. i.e. The sample proportion,…

Q: A clinical trial is investigating the effectiveness of a new pain reliever drug. 40 people with…

A: A t-test  is a type of inferential statistic used to determine if there is a significant difference…

Q: The table below includes results from polygraph (lie detector) experiments conducted by researchers.…

A: There are two categorical variables which are subject and polygraph test indication. We have to test…

Q: The table below includes results from polygraph​ (lie detector) experiments conducted by…

A: a.   It is needed to check, whether subject lies is independent of the polygraph test indication.

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: From the provided information, Sample size (n) = 54 Out of which 35 involved an intoxicated driver.…

Q: To determine if people prefer this year's school start time over last year's school start time, WCS…

A: From the above data

Q: (b) What is the test statistic? (Round your answer to 3 decimal places, if needed.) (c) Using the…

A: Followings are the Explanation of the question Use the two-sample independent t test assuming the…

Q: The mean score on a widely freshman history examination is 75. A history teacher at a very large…

A: Given : population mean(μ)=75 Xi=test scores Dataset:

Q: Among 70 school children set up an experiment in which you test that sex of the child and handedness…

A: Data are given, Test the claim that gender of the child and handedness are dependent 5% level of…

Q: d) Calculate your test statistic. Write the result below, and be sure to round your final answer to…

A: we have given that  n=54;  ¯x=40.66 pounds;  s=3.97 pounds  and alpha=0.05 NOTE:- According to…

Q: Is “how long it takes to correctly solve the puzzle” an explanatory variable or response variable?…

A: The variable that explains the expected cause, i.e., in other words, the variable that explains the…

Q: Marketers believe that 69.6 % of adults in the U.S. own a cell phone. A cell phone manufacturer…

A: According to the given information in this question We need to apply z test for one population…

Q: c)  In the test of a certain hypothesis the p-valuecorresponding to the test statistics is 0.0316.…

A: Given that  P-value=0.0316 i) 0.01 level of significance  ii) 0.05 level of significance  iii) 0.10…

Q: A statistical test of hypothesis produces the P-value P = 0.604.  Will the null hypothesis be…

A: Given : P-value = 0.604 level of significance = 0.05  Here : P-value : 0.604 > 0.05

Q: d) What is the p-value for this hypothesis test? Round your answer to 4 decimal places. p =

A: We have to find p-value for two-tailed test when z = 1.44 ?

Q: For married couples, is there a significant difference in data usage between the two partners on…

A:

Q: The p-value for a hypothesis test turns out to be 0.09064. At a 5% level of significance, what is…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Click the icon to view the table. Determine the null and alternative hypotheses. OA. Ho: Polygraph…

A: df=(row-1)(column -1)

Q: The null and alternate hypotheses are: He: T1 ≤ 1₂ H₂: T₂ > TT₂ A sample of 100 observations from…

A: sample size(n1)=100x1=70sample size(n2)=150x2=90significance level()=0.05The null and alternative…

Q: In 1948, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: State the hypotheses.   Obtain the value of the test statistic. The value of test statistic is…

Q: An insurance company collects data on seat-belt use among drivers in a country. Of 1600 drivers…

A:

Q: Does your doctor know? A survey8 of articles from the New England Journal of Medicine (NEJM)…

A: a. The data represents the non-editorial articles appearing during the publication years in the form…

Q: Migraine and Acupuncture: A migraine is a particularly painful type of headache, which patients…

A: Answer  Given  [O]                 Pain free: yes            Pain free: NO           Total Treatment…

Q: There is a common belief that "men marry women who are younger than they are". To test this…

A: Given that  Sample size n =100 Null and alternative hypothesis  H0 and H1.

Q: Explain how the P-value is obtained for a one-mean z-test in case the hypothesis test is a. left…

A: p-value:The probability value associated with a statistical test is defined as the p-value. In other…

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.