A local transportation planning group is concerned about the lack of car-pooling on the part of commuters. They are afraid that the proportion of local drivers car-pooling is below the national average of 15%. A survey of 600 local drivers reveals that 13% of them car pool. Is there evidence that the actual proportion of local commuters car-pooling is less than 15%? a)    Test the hypothesis at the 10% significance level.   b)    Find the p-value of this test. Is the result statistically significant at the usual α levels; namely 0.01, 0.05, and 0.10?  (Show all your work)

Q: An article in The Wall Street Journal implies that exactly half of all Americans would prefer being…

A: Answer:From the given data,Sample size (n) = 1040 respondentsSample proportion…

Q: 8)  A researcher wanted to determine whether there is any difference in the popularity of football…

A: a) A null hypothesis is a statement of no difference and the alternative hypothesis is simply the…

Q: In 2005, Health Canada claimed that 16.8% of Canadian adults are obese. A researcher wanted to check…

A: Given, The sample proportion is,

Q: If a hurricane was headed your way, would you evacuate? The headline of a press release states,…

A: Sample size = n = 4625 Sample proportion = p̂ = 0.32

Q: A researcher claims that the percentage of infants who receive immunizations is less than 80%. She…

A:

Q: shorter than 60 hours

A: For the given data : sample size, n = 10 sample mean, x̄ = 59.5 sample standard…

Q: 4) A survey investigates whether the proportion of 8% for employees who commute by car to 4). work…

A: Given population proportion = 8% n=1000 sample proportion = 12% To test appropriate hypothesis

Q: 3. A local organization conducted a random sampling of 360 Medford homes d Bowl telecast. It was…

A: Let X be the number of Medford households watching the Super Bowl. From the random sample of 360…

Q: The percentage of physicians who are women is 32.4%.  In a survey of physicians employed by a large…

A: This problem can be solved by using test of significance for single proportion. In usual notations,…

Q: . A Pew Research Center poll of 3,671 Americans showed that 48% of the respondents prefer to watch…

A:

Q: Gallup surveyed adult Americans about their consumer debt. They Reported that 47% of millennials and…

A: Given information: Proportion of millennials who did not pay off their credit cards p1=0.47…

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: Some people are concerned that new tougher standards and high-stakes tests adopted in many states…

A: Given : x = 210 n = 1782 Hypothesis : H0 : p ≤ 0.103 Ha : p > 0.103 p^ = 2101782 p^ = 0.1178 sp^…

Q: Radio Shack reported that they sell 21% of all home computers. a) Is this claim supported at the 1%…

A: GivenNo. of computers (n)=700x=120p^=120700=0.171α=0.01

Q: An executive believes that no more than 80% of the company's employees take all of their vacation…

A: We have to find null and alternative hypotheses for given data...

Q: Suppose that in the exit poll from the state of Florida during the year 2000 presidential elections…

A: Given: x=407, n=765p=xn=407765=0.532 The null and alternative hypothesis is, H0:P=0.5Ha:P>0.5 The…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: Among 274 people over the age of 55, 76 dream in black and white, and among 323 people under the age…

Q: In another Harris poll, adults were asked if they are in favor of abolishing the penny. Among 200…

A: From the given information,                        Sample size (n) =200 Probability of success…

Q: In a recent Gallup poll, 507 adults age 18 and older were surveyed and 269 said they believed they…

A:

Q: In 2010, shortly before a country's midterm elections, people in that country were dissatisfied with…

A: P=0.57 P-cap=0.61 n=1067

Q: Consider a hypothesis test to decide whether the mean annual consumption of beer in the nation's…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: Thirty-three percent of all Americans drink bottled water more than once a week (Natural resources…

A: Note: Hi there! Thank you for posting the question. Unfortunately in the sub-part(b), some required…

Q: Assume that adults were randomly selected for a poll. They were asked if they "favor or oppose using…

A:

Q: The National Technology Readiness Survey sponsored by the Smith School of Business at the University…

A: Denote p2009 and p2004 as the true population proportions of spam emails deleted by Americans in…

Q: The ABZ Medical Association compiles information on physicians in a state and found that they can be…

A: Null and alternative hypothesis: Denote the proportion of physicians classified into general…

Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…

A: Given that  Sample size n =200 Favorable cases x =30 Sample proportion p^=x/n  =30/200 =0.15

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: who live within 20 miles of the coast in high hurricane risk counties of eight southern states. In…

A: It is given that sample size (n) is 4,625 and p hat value is 1-0.32 = 0.68.

Q: o test the fairness of law enforcement in its area, a local citizens’ group wants to know whether…

A: Given:   Ticketed  Not ticketed Men  21 173 Women 37 169

Q: 32. Race and smoking 2015 Data collected in 2015 by the Behavioral Risk Factor Surveillance System…

A: (a) Let p⏞w represents the proportion of white smokers and p⏞b represents the proportion of black…

Q: A power analysis is a calculation used to estimate the smallest sample size needed for an…

A: 1)It is impossible to overstate the value of power analysis in an experiment. It is a vital tool for…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: The question is about hypo. testing Given : No. of people over the age 55 ( n1 ) = 303 No. of people…

Q: Past studies have indicated that the percentage of smokers was estimated to be about 30%. Given the…

A:

Q: The Bureau of Labor Statistics reports that the official unemployment rate for Black people was…

A: Variables are of different types. The correct classification of variables and the identification of…