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 a journal reports that​ 31% of American fathers take no responsibility for child care.…

A: Given, Population proportion P=31%=0.31 Sample size of fathers n=235 Number o fathers who did not…

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

A:

Q: In a random sample of 1066 U.S. adults, 580 think that the U.S. government is doing too little to…

A: Given Information: Sample size (n1) = 1066 Out of which x1 = 580  think that the U.S. government is…

Q: A recent report indicated that families in a certain country typically spend about $175 per week on…

A: Provided information is, recent report indicated that families in a certain country typically spend…

Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A:

Q: What would you conclude based on an α=0.05 ​level?   We reject   the null hypothesis and do not…

A: From the previous information, it is known that the p-value is  0.9857. And level of significance is…

Q: Which provides stronger evidence against the null hypothesis, a P-value of 0.06 or a P-value of…

A: Decision criterion:If the p-value of the test is less than or equal to the level of significance,…

Q: A 2011 survey, by the Bureau of Labor Statistics, reported that 91% of Americans have paid leave. In…

A: Type I error: In hypothesis testing the Type I error is said to be committed when true null…

Q: The U.S. Bureau of Labor Statistics reports that 11.3% of U.S. workers belong to unions (BLS…

A: Given Information Hypothesized proportion p = 0.113 n = 400 x = 52 Sample proportion is given by

Q: A newspaper article indicated that 43 percent of cars with black seats are white, 46 percent of cars…

A: Given: Total categories =k=4 Degrees of Freedom= k-1 =3 chi-square test statistic = 8.2

Q: Recently, a large academic medical center determined that 7 of 15 employees in a particular position…

A:

Q: A television executive claims that the percent of households that watch the Macy's parade on…

A:

Q: A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students…

A: Introduction:Denote p̂ as the true proportion of the college students who attended the opening night…

Q: In a survey of 1,000 women aged 22 to 35 who work full time, 555 indicated that they would be…

A: A survey of 1,000 women aged 22 to 35 who work full time were considered in which 555 indicated that…

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

A: Given: Machines sold in Florida, n1 = 400 Machines sold in Florida, n2 = 400 x1 = 44 x2 = 24 Level…

Q: A manufacturer of baby powder claims that 20 out of 56 mothers prefer brand A of baby powder. A…

A: X=20, N=56x=8, n=25α=0.01

Q: A survey claims that 9 out of 10 doctors recommend brand W for their patients who have children. To…

A:

Q: A recent newspaper story claims that less than 12% of the current US workforce are union members. A…

A:

Q: To study whether the students at a university are satisfied with the food service, a sample of 200…

A:

Q: A repeated-measures ANOVA has SSwithin treatments = 14 and SSbetween subjects = 8. For this…

A:

Q: The producer of a TV special expected about 40 percent of the viewing audience to watch a rerun of a…

A:

Q: It has been determined that 37 out of 100 adult Americans that did not attend college believe in…

A: There are two independent samples which follows normal distribution. We have to test whether the…

Q: A recent study at a local college daimed that the proportion, p, of students who commute more than…

A: Given that, x=55,n=265 The sample proportion is,

Q: Researchers examined the relationship between social playtime and emotional intelligence in a sample…

A: From the provided information, The hypotheses can be constructed as: H0: ρ = 0 (There is no…

Q: Interpret the P-value.

A: here given , A store manager claims that 60% of shoppers who enter her store make a purchase. To…

Q: A recent report indicated that families in a certain country typically spend about $175 per week on…

A:

Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…

A: Population 1 Population 2 Sample size n1=591 n2=588 Sample portion x1=436…

Q: What is the purpose of performing individual t-tests after carrying out the overall F-test? What are…

A: Overall F-test is useful for test whether the model is significant at overall. Individual t-tests…

Q: A campaign manager believes their candidate has won an election (p> 0.50). To test this at the 0.05…

A:

Q: How often do you go out dancing? This question was asked by a professional survey group on behalf of…

A: Let p1: proportion of single men who go out dancing occasionally p2:proportion of single women who…

Q: It has been determined that 37 out of 100 adult Americans that did not attend college believe in…

A: Consider that p is the true proportion of adults that did not attend college believe in…

Q: A consulting firm had predicted that 30% of employees at a large firm would take advantage of a new…

A: From the provided information, A consulting firm had predicted that 30% of employees at a large firm…

Q: According to the National Highway and Traffic  Safety Administration,  the proportion of fatal…

A: D) The conditions for hypothesis testing of proportion are: np≥10n(1-p)≥10, here, n represents…

Q: A newsletter publisher believes that less than 68% of their readers own a Rolls Royce. For marketing…

A: The advertiser is decided to reject the null hypothesis that means accept the alternative…

Q: A car manufacturer claims that less than 10% of its cars should need repairs in the first three…

A: Given,n=50x=8sample proportion(p^)=xnp^=850=0.16population proportion(P)=0.10H0:P=0.10H1:P<0.10

Q: A 2011 survey, by the Bureau of Labor Statistics, reported that 91% of Americans have paid leave. In…

A: The hypothesis tested were "the proportion of people who have paid leave has decreased" vs " the…

Q: A significance test is conducted for which the alternative hypothesis states that more than 83…

A: As per the question we have Claim :- More than 83 percent of all adult sea turtles on a certain…

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

A:

Q: Elliot read a report from a previous year saying that 6% of adults in his city biked to work. He…

A: Given,   The sample proportion is,

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A:

Q: A newsletter publisher believes that less than 68 % of their readers own a Rolls Royce. For…

A: Hypothesis test means, decision-making about the population parameter. In the null hypothesis and…

Q: In 1965, about 44% of the u.s. adult population had never smoked cigarettes. A national health…

A: The proportion of U.S adults who had never smoked (population proportion P) is 0.44 Let 'x' be the…

Q: 17) In an experiment, 16% of 734 subjects treated with viagra experienced headaches. In the same…

A: The null and alternative hypotheses are stated below:

Q: Does stretching before exercise reduce the chance of injury? To answer this question, a random…

A:

Q: A publisher reports that79%of their readers own a personal computer. A marketing executivewants to…

A:

Q: In a national survey of 2013 adults, 1283 indicated that they believe rudeness is a more serious…

A: Given that

Q: The administration of a University claims that 47 percent of the students change their major area of…

A:

Q: An LED light bulb manufacturer claims that the average lifespan of its 60-watt LED light bulbs is…

A:

Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…

A: As per bartleby guideline expert have to answer first question three subparts only dear student…

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.