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: In a survey of 909 U.S.adults with children conducted by the financial Industry Regulatory…

A: The hypotheses for the test is given below.Null hypothesis:H0: p = 0.30Alternative hypothesis:H1: p…

Q: a) What is the level of significance? State the null and alternate hypotheses. H0: ? = 13.5; H1: ?…

A: Let μ be the population mean average mileage driven. Given that, Population mean (μ) = 13.5…

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: Suppose that your sample size was 37, what is P(t<-1.74) (Negative 1.74)?

A: Given information- Sample size, n = 37 t-score = -1.74 We have to find the p (t&lt;-1.74). Degree of…

Q: ng to the annual CSI Computer Crime reported 55% of businesses suffered unauthorized use of computer…

A: The null and alternative hypothesis is, 0.55Ho:p=0.55 Ha: p &amp;lt; 0.55Ha:p&lt;0.55 This is a…

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: Physicians at a clinic gave what they thought were drugs to 900900 patients. Although the doctors…

A: Let p be the population proportion of patients reported an improved condition. The hypothesis that…

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: the food marketing insititute reports that 28% of households spend less than $100 per week on…

A: the probability that less than 102 households spend less than $100 per week on groceries is…

Q: Test the claim that the proportion of men who own cats is significantly different than 45% at the…

A: Solution: Let X be number of men owned cats and n be the sample number of men. From the given…

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: One manufacturer claims that less than 6% of their fax machine is malfunctioning. In a random sample…

A:

Q: plé wõi nple would d not expec

A: A sample is a set of individuals or objects collected or selected from a statistical population with…

Q: Select the most appropriate response. Five years ago, a survey found that the proportion of city…

A: Solution:  The null and alternative hypotheses are:

Q: Twenty years ago, 55% of parents of children in high school felt it was a serious problem that high…

A: Given n=700 P0=0.55

Q: Based on information from the Federal Highway Administration web site, the average annual miles…

A: Consider that μ is the national average of the mileage.

Q: Nationwide 13.6 percents if employed wage and salary workers are union members. At random sample of…

A: Solution: Let X be the number of union members and n be the sample number of local wage and salary…

Q: An airline company is interested in improving customer satisfaction rate from the 78% currently…

A: Hi! Thanks for posting the question. Since there are more than one question we will answer first…

Q: Researchers claimed that women exercise at the same proportion as men do. To test this claim, a…

A: For the given data Perform Z test for two proportions

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: 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: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A: Given that, In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern…

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: Based on information from the Federal Highway Administration web site, the average annual miles…

A: Determine the statement of the hypothesis. Here, testing whether average miles driven per vehicle in…

Q: A poll surveyed 503 video gamers, and 106 of them said they prefer playing games on a console rather…

A: Denote p as the true proportion of video gamer, who said they prefer playing games on a console…

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

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: What is the conclusion? A recent survey done by the Philippine Housing Authority found that 35% of…

A: The hypotheses are given below: Null hypothesis: H0:p=0.35 Alternative hypothesis: H1:p≠0.35 Since…

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

A:

Q: A recent study indicated that 18% of people free from cardiovascular disease were considered obese.…

A:

Q: Based on information from a large insurance company, 66% of all damage liability claims are made by…

A: From the provided information, Sample size (n) = 51 From which 43 were made by single people under…

Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A:

Q: tor & Gamble claims that at least half the bars of Ivory soap they produce are 99.44% pure (or more…

A: The null and alternative hypotheses are: Ho: p ≥ 0.50Ho:p≥0.50 Ha: p &amp;lt; 0.50Ha:p&lt;0.50 This…

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.