In 2001, the Gallup poll found that 81% of American adults believed that there was a conspiracy in the death of President Kennedy. In 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the assassination, and found that 634 believe there was a conspiracy ("Gallup news service," 2013). Do the data show that the proportion of Americans who believe in this conspiracy has decreased? Test at the 1% level.

Q: According to USA Today, 65% of Americans are overweight or obese.8 If five Americans are chosen at…

A: Given information Probability that the Americans are overweight = 0.65 n = 5

Q: According to a survey of 5041 Star Trek fans conducted in 2010, 2873 are females. Use this data to…

A: Null Hypothesis: H0: p<=0.5 Alternative Hypothesis: H1:p>0.5 Given that x=2873 and n=5041…

Q: 1. The chi-square test statistic is equal to |(Round to 2 decimal places) 2. The degrees of freedom…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A:

Q: 1.What would happen to the confidence intervals if you changed the level of confidence? 2.What…

A: The general formula for calculating width of the confidence interval for the population proportuon…

Q: In the 2019 P&G color report, it was stated that 23% of cars in North America are wnite. TOu wonder…

A: The test hypotheses are given below:

Q: According to online resources, about 8% of all males have some color perception defect, most…

A: Given,8% of all males have the same color perception defect, most commonly red-green…

Q: Approximately 1.55 percent of people ages 40-50 have breast cancer.* Suppose a person has a 86…

A: Probability is a chance of occurrence of any event.

Q: Suppose that a poll taken 10 years ago found that 56% of parents spank their children. Suppose a…

A: It is given that 56% of parents spank their children.

Q: In a survey conducted by the Gallup organization on September 6-9, 2012, 1,017 adults were asked "In…

A: From the given data ( 1 ) Frequency table Confidence LevelFrequencyGreat deal81Fair amount325Not…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: From the given information, the hypothesized mean is 148.

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: Given:Population mean = 145Sample mean = 139Sample standard deviation s = 28.

Q: a particular region, 3% of the population is thought to have a certain disease. A standard…

A: The formula for computing the probability that the test is positive is, P( test is positive) =  {P(…

Q: What are the null hypothesis ( H0 ) and the alternative hypothesis ( H1 ) that should be used for…

A: a) null Hypothesis H0 - μ =145     Alternate Hypothesis H1 - μ <> 145 (μ not equal to 145) b)…

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Given, n=119, x=31, α=0.05 Then, p^=31119=0.260504

Q: (a) What are the null hypothesis H. and the alternative hypothesis H, that should be used for μ the…

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: Note: Hey there! Thank you for the question. As you have posted a question with multiple sub-parts,…

Q: According to the Pew Research Center,on the propotion of the American population who use only a…

A: A)Verifying the conditions:It is given that, the proportion of the American population who use only…

Q: An executive for a large company is considering a change to health insurance plans offered to the…

A: An executive for a large company is considering a change to health insurance plans offered to the…

Q: In a survey of 1002 people, 701 (70%) said that they voted in the last presidential election (based…

A: Total sample size = 1002.  No. of people said they will vote = 701.  According to Records voters…

Q: Suppose an SAT preparation course makes the following statement in their advertising brochure: “We…

A: Given that Suppose an SAT preparation course makes the following statement in their advertising…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A:

Q: Use these results from a USA Today survey in which 510 people choseto respond to this question that…

A:

Q: tourists

A: Here hypothesis testing of proportion

Q: Test whether a majority of Kansas residents planned to set off fireworks on July 4th. In other…

A: Testing of population proportion is used here which is a binomial test that compare a proportion of…

Q: According to the Pew Research Center,on the propotion of the American population who use only a…

A: Solution:Part(D):Finding the test statistic value for the hypothesis test for…

Q: Quinnipiac University Poll is a leading polling organization. In May 2019, it released a survey…

A: For Republicans,   Proportion of positive results = P = x/N = 0.68 sample size =N=213Standard error…

Q: O According to a 2018 article in Esquire magazine, approximately 70% of males over age 70 will…

A: P(C) = 0.02   So,   P(C') = 1 - P(C)   = 1-0.02   = 0.98   P(+|C') = 0.75   So,   P(-|C') = 1 -…

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: Suppose a survey of 954 homeowners found that more than 24​% bought flood insurance. Which part of…

A: In a survey of 954 homeowners, more than 24​% bought flood insurance.

Q: In 2008, there were 507 children in Arizona out of 32,601 who were diagnosed with Autism Spectrum…

A:

Q: In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests."…

A: Given information: Sample of 200 buses and find that 20 buses fail the safety inspection. Let us…

Q: It was reported that 29% of car crash deaths in Maine were alcohol-related.…

A: Obtain the probability that at most 14 were alcohol-related.   The probability that at most 14 were…

Q: In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were were asked…

A:

Q: Sixty eight percent of German workers say they have a bad manager. Consider a random sample of 50…

A: Sixty eight percent of German workers say they have a bad manager. Consider a random sample of 50…

Q: sample of n = 80 C of I students found 16 with brown eyes. Give the numerical value of the statistic…

A: Sample size n=80Favorable cases=16

Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…

A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…

Q: According to the Pew Research Center, the proportion of the American population who use only a…

A: Given that n = 30 x = 16 α=0.10Given claim : proportion greater than 0.37The claim is either the…

Q: A group of students from a private school in San Juan underwent the IQ test and these were the…

A: The data is provided for a group of students from a private school who underwent the IQ test and…

Q: Fifty-five percent of people who move from an area without fire ants to an area with fire ants get…

A: From the above data We are given that Fifty-five percent of people who move from an area without…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: The hypothesized mean is 148.

Q: 6. In March 2010, the Pew Research Group surveyed 1708 adults Americans and asked, "Do you believe…

A: It is a left tailed test

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.