A local Police Department believes that at least 80% of the drives stopped on Saturday nights for speeding are under the influence of alcohol. A sample of 50 drivers who were stopped for speeding on a Saturday night was taken and 71% of the drivers in the sample were under the influence of alcohol. At 5%, test the police department's belief. What is your conclusion? What is the p-value for this test?

Q: An article in the Washington Post on March 16, 1993 stated that nearly 45 percent of all Americans…

A: The question is about hypo. testing Given : Randomly selected no. of students ( n ) = 82 No. of…

Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A: Given: p0=0.98α=0.01n=500x=480

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: Given, Nationally, 83% of Americans have earned a high school diploma.  We want to see if the…

Q: uppose we are testing Ho: p=.20 vs Ha: p does not equal .20 and TS=2.34. What is the p-value?

A: given data  Ho : p = 0.20 Ha:p≠0.20 test statistic Z = 2.34 p value = ?

Q: samples of 500 persons each, and using the 0.01 level of significance, can we conclude that the…

A: It is given that For conventional PC, sample size n1 = 500, sample proportion = 0.80 For touchscreen…

Q: ecause the course seems too intimidating. The university administra nforms professors that the drop…

A: Let X be the number of persons possessing the given attribute in a sample of size 'n'. Let p denote…

Q: A reporter has claimed that the majority of Colleges in the United States are Private For-Profit…

A:

Q: ou are testing the claim that the proportion of men who own cats is significantly different than the…

A: given data, sample of 100 men, and 10% own cats.n1=100p^1=0.10x1=0.10*100=0.10 You sample 80 women,…

Q: A survey of 50 girls in canada who played soccer in the summer found that 35 of them also played…

A: sample size(n)=50No.of girls played volleyball in the winter(x)=35

Q: n automobile owner found that 20 years ago, 74% of Americans said that they would prefer to purchase…

A:

Q: The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the…

A: From the provided information, Sample size (n) = 250 She would now like to determine whether or not…

Q: A teacher claims that over 15% of maths students are married, in the survey at the beginning of…

A: Answer: From the given data, Claim: A teacher claims that over 15% of maths students are married…

Q: You are testing the claim that the proportion of men who own cats is smaller than the proportion of…

A:

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

A: Formula of test statistic : z = p^1 -p^2p(1-p)1n1-1n2 Where , p^1 and  p^2 are sample proportion. n1…

Q: Do You Find Solitude Distressing? "For many people, being left alone with their thoughts is a most…

A: Here, the number of college students those who were asked to hand over their cell phones and sit…

Q: At the 0.05 level of​ significance, is there evidence of a difference in the proportion of males and…

A: For males, sample size n1 = 300, and proportion of males who make an impluse purchase is 62% = 0.62…

Q: It has been claimed that at UCLA 43% of all students live on campus. Researcher Ebony Robinson…

A: Given X=112 n=250

Q: A law enforcement agent believes that 80% of the drivers stopped on Saturday nights for speeding are…

A: The hypothesized proportion is 0.80.

Q: A survey in Brighton among cancer patients revealed that 62 out of 454 women patients are diagnosed…

A: Solution: Let X1 be the number of women patients are diagnosed with lung cancer, X2 be the number of…

Q: You are testing the claim that the proportion of men who own cats is larger than the proportion of…

A: Denote p1, p2 as the true population proportions of men and women who own cats, respectively.

Q: A researcher wants to examine how a new intervention helps children learn to read. A random sample…

A: In the provided information, the one sample t-test will be used for measurement because it is used…

Q: reporter has claimed that the majority of Colleges in the United States are Private For-Profit…

A:

Q: It is thought that 12% of all students taking a particular course received a grade of A. In a sample…

A:

Q: On average, they report 6.6 hours a week going to parties, and the sample SD (or SD+) is 9 hours.…

A: Let  be the population mean number of hours a week going to parties.Given that,Population mean…

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: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 236 women,…

A: From the provided information,

Q: Is there a difference in the proportion of individuals with food allergies between young children…

A: Denote p1 is true proportion of young children have food allergy and p2 is the true proportion of…

Q: A very wise teacher measured brain activity in all 20 seniors in his Statistics class in the first…

A: We have to find p value for given testing.

Q: A software company is interested in improving customer satisfaction rate from the 74% currently…

A: Z-Test:  Here the hypothesis test is for the population proportion. The test statistics compared…

Q: Students in a high school statistics class are investigating the proportion of times a Hershey's…

A: We have to find correct conclusion from available options.

Q: in october 1947 the gallup organization surveyed 1000 adult americans and asked are you a total…

A: We have given thatn1 = 1000 , x1 = 378n2 = 1000 , x2 = 333Significance level (α) = 0.05Now,p̂1 =…

Q: According to a 2015 article, 37% of Americans aged 25 years or older have been arrested. An Orange…

A: Given that sample size n = 120 Number of persons who have been arrested, X = 48 Level of…

Q: steep aphea. live in the inner city have sleep apnea. Of the 317 people from the inner city…

A: An experiment is conducted and the test statistics and p value are given here. g)  The second…

Q: A research center claims that at least 23% of adults think their taxes will be audited.  A random…

A: Yes, there is a enough evidence to reject the claim Explanation:Step 1 : Formulate the hypothesis…

Q: The U.S. Department of Energy reported that 51.7% of homes were heated by natural gas. A random…

A: Given X=115 n=221

Q: The mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor’s…

A:

Q: According to a survey conducted by the Association for Dressings and Sauces, 20% of American adults…

A: Given: A survey is conducted by the Association for Dressings and Sauces. Let n denote the sample…

Q: A teacher measured brain activity in all 60 seniors in her Statistics class in the first week of…

A: The null and alternate hypothesis are H0 : μd=0HA : μd<0 where, μd is the difference of the first…

Q: What is the correct decision for a test of the difference in two proportions if the test statistic…

A: It is given that the test statistic is 1.99.

Q: The null and alternative hypotheses would be: Ho: ?v Select an answerv (please enter a decimal) H1:…

A:

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.