Speaking to a group of analysts in January 2006, a brokerage firm executive claimed that at least 61% of investors are currently confident of meeting their investment objectives. A UBS Investor Optimism Survey, conducted over the period January 2 to January 15, found that 58% of investors were confident of meeting their investment objectives. (CNBC, January 20, 2006). Assume the UBS Investor Optimism Survey collected information from 317 investors. What is the p-value for the hypothesis test?

Q: In July of 2013, Australians were asked if they thought unemployment would increase, and 47% thought…

A: We have to test at  whether the proportion of people who thought that the unemployment is increases…

Q: Write the statistical hypotheses.

A: The information provided in the question are as follows : The researcher wants to test whether there…

Q: t wishes to determine whether there is evidence that average family income in a community exceeds…

A: We see that, The null hypothesis states that average family income is equal to $25000 whereas the…

Q: In 2012, the Supreme Court upheld the constitutionality of the Affordable Care Act (ACA), known…

A: As per the question, we are given 95% Confidence interval (43%, 49%) Margin of error = 3% 1) We are…

Q: Although most medical experts agree that vaccinations are completely safe and one of the greatest…

A:

Q: practice question #1. A candidate running for office next year wants to know what proportion of…

A: Hypothesis is an assumtion that is being tested.

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: In a telephone survey of 1100 adults, 740 adults expressed concern about the future health of social…

A:

Q: they had Banks: A poll institutions. A total of 159 adults said that they had a great deal of…

A: Hi! Thank you for the question. As per the honor code, we are allowed to answer three sub-parts at a…

Q: A 2015 Gallup poll of 1,627 adults found that only 22% felt fully engaged with their mortgage…

A: Here the sample size is number of adults.

Q: A television station surveys 200 customers and finds that 23% of customers watch the evening news.…

A: Given data n=200 p=23% confidence level=99%

Q: A large software development firm recently relocated its facilities. Top management is interested in…

A: Given: p= 0.40Need to find null and alternative hypothesis condition.

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: The type of study used is determined below as follows:   From the given information, the claim is to…

Q: You think that there might be a relationship between income and what type of outdoor activities…

A:

Q: Describe a business scenario where you would have to test more than two samples of data. What type…

A: Given information: The investigator is specially interested describe a scenario to test more than…

Q: Is college worth it? Part I. Among a simple random sample of 331 American adults who do not have a…

A: Given: p^=0.50n=331p=0.50

Q: A web developer has decided to use a new technique in web design. He divided his accounts into 10…

A: Followings are the Explanation of the question

Q: A survey company polls 1,233 voters about whether they plan to vote for the Liberal or the…

A: Sample size 52% of voters prefer the Liberal candidate i.e., Significance level

Q: A credit crunch gripped the nation in 2007-2008 leading to record numbers of mortgage foreclosures…

A: Given that ; From the given information we make a hypothesis. By using the concept of the hypothesis…

Q: A poll was conducted to examine if people are happy with the government. 400 people were asked and…

A: It is an important part of statistics . It is widely used .

Q: Online Tax Returns. According to the Internal Revenue Service, among people entitled to tax refunds,…

A: It is given that:

Q: ng 100d insecurity, which is having a disruption of food intake because of lack of money or other…

A: It is needed to test, whether the researcher’s sample was consistent with reports.

Q: You are trying to build a model to predict the probability of winning over/under bets for total…

A: Given that to build a model to predict the probability of winning over/under bets for total points…

Q: The American Association of Individual Investors (AAII) conducts a weekly survey of its members to…

A: If the AAII survey results for the week ending March 27, 2019, were based on a sample of 300 AAII…

Q: A hypothesis test is conducted to determine whether the percentage of US adults that think marijuana…

A: Given,n=400x=144p^=xnp^=144400=0.36

Q: A poll asked the question, "What do you think is the most important problem facing this country…

A: Solution:The confidence interval formula for proportion formula is,

Q: A poll asked the question, "What do you think is the most important problem facing this country…

A: Given Information: Mean percentage = 21%  Margin of error = 4%

Q: A public opinion organization wants to know if opinions on gun control laws have changed over time.…

A: Given that, a poll conducted in 2006 found that 55% of people favored stricter gun laws.

Q: A study showed that 62% of supermarket shoppers believe supermarket brands to be as good as national…

A: claim is that the percentage of supermarket shoppers who believe that the supermarket ketchup was as…

Q: The American Association of Individual Investors (AAII) On-Line Discount Broker Survey polls members…

A: Introduction: The speed of execution is the independent variable, which we have denoted as x, and…

Q: Minimum wage, Part I. Do a majority of US adults believe raising the minimum wage will help the…

A: Given: n=1000 p^=42%  =42100  =0.42

Q: Based on a USA Today poll, 10% of the population believes that college is no longer a good…

A:

Q: The school's newspaper reported that the proportion of students majoring in business is more than…

A: According to the given information in this question We need to identify the correct option

Q: 3. Today, in a random sample of 30 people, Trump received an approval rating of 30% world- wide. On…

A:

Q: a. What is the test statistic?  b. What is the p-value? (Round your answer to four decimal places.)…

A: a. The claim of the test is hat 60 percent of the students who take her Elementary Statistics class…

Q: Briefly describe the relationship between confidence interval and hypothesis testing.

A: Briefly describe the relationship between confidence interval and hypothesis testing.   A 95% CI…

Q: political researcher takes a survey of 310 randomly selected registered voters in Orlando, and each…

A: Given that.  n=310 , Candidate A=110 , Candidate B=185 Unsure or plan to vote for another…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.