Married at 25. A study suggests that the 25% of 25 year old’s have gotten married. You believe that this is incorrect and decide to collect your own sample for a hypothesis test. From a random sample of 25 year old’s in census data with size 776, you and that 24% of them are married. A friend of yours offers to help you with setting up the hypothesis test and comes up with the following hypotheses. Indicate any errors you see.

Q: Does this provide evidence that the proportion of UCD students who are left-handed differs from the…

A: Given : n=240 , X=30 , p0=0.10 , α=0.05 Here , we want to test the claim that the proportion of UCD…

Q: A reader wrote in to the “Ask Marilyn” column in Parade magazine to say that his grandfather told…

A: As per guidelines we will only answer first three subparts, please repost other subparts for more…

Q: In a survey of 240 students in an elementary statistics class at the University of California-Davis…

A: State the hypotheses. That is, there is no evidence to conclude that the proportion of UCD students…

Q: A researcher develops a new drug to treat stress but she isn't sure what kind of effect it will have…

A:

Q: In a sample of 49 men, 38 said that they had less leisure time today than they had 10 years ago. In…

A: The claim is that there is a difference in the proportions.

Q: samples 70 technology companies and finds that 44 of them have Twitter accounts. Can she conclude…

A: The hypothesized proportion is 0.73.

Q: A store manager hypothesizes that the average number of pages a person copies on the store’s copy…

A: The provided information is   n=50 α=0.01 1. The null hypothesis is Ho:µ=40 E. = 2. The alternative…

Q: A sample of n=25 individuals is randomly selected from a population with a mean of p=65, and a…

A: Given that   x̄ =70 ,  μ = 65  , s = 20 , n =25   Test statistic ( t  )  t = ( x̄ -  μ  )/(s/√(n)

Q: According to a recent​ report, 46​% of college student internships are unpaid. A recent survey of 80…

A: Since you have asked two questions, I am submitting the part a. Please re post the part b as next…

Q: A certain university has decided to introduce the use of plus and minus with letter grades, as long…

A: Given info: A certain university has decided to introduce the use of plus and minus with letter…

Q: According to a food website, the mean consumption of popcorn annually by Americans is 63 quarts. The…

A: Given data: Mean = 63 quarts

Q: Are Republicans less likely than Democrats to display the American flag in front of their residence…

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

Q: g. With which p level-0.05 or 0.01 reject the null hypothesis? Explain.

A: While conducting a Z-test, the 6 steps of hypothesis testing are: i) Identifying the population and…

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

A: Note : Thank you for posting the question! Since your question has more than 3 parts, we have solved…

Q: Generally speaking, would you say that most people can be trusted? A random sample of n1 = 254…

A: Determine the level of significance. Significance level:  In order to decide how small the p-value…

Q: Recently, a large academic medical center determined that 8 of 19 employees in a particular position…

A: Solution: Given data X = 8 n =19 Pi = .54 Level Of significance = 0.05

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

A:

Q: A sample of n=25 individuals is randomly selected from a population with a mean of u=65, and a…

A: For the given data perform t test for one mean

Q: A survey of 80 r/s SCC students shows that 54 of them have a C-average or better. Perform a…

A: Given that  Sample size n =80 Favorable cases x =54 Sample proportion p^=x/n  =54/80 =0.675 NOTE:-…

Q: A book club wonders if fewer than 40 percent of students at a local university had read at least one…

A: Test hypothesis: Denote the population proportion of students at a local university who had read at…

Q: Recently, a large academic medical center determined that 8 of 15 employees in a particular position…

A:

Q: In 1995, it was determined that 78% of US citizens supported a ban on household aerosols.  Thinking…

A: Null and alternative hypotheses: The hypothesis which is tentatively fixed up under and tested for…

Q: Are Republicans more likely than Democrats to display the American flag in front of their residence…

A: Given, p1^=396640=0.62p2^=373665=0.56n1=640n2=665α=0.05

Q: A newsletter publisher believes that 67 % of their readers own a personal computer. Is there…

A: Here we need to state the null and alternative hypothesis for the given situation.

Q: 2. The average U.S. household has $235,600 in life insurance. A local insurance agent would like to…

A: Population mean = ? = 235600 Sample S.D = s =25500 Sample size = n =30 Sample mean = x̅ =…

Q: local school board wants to determine if the proportion of households in the district that would…

A: Given P value=0.04 Alpha=0.05

Q: A decade-old study found that the proportion of high school seniors who felt that "getting rich" was…

A: From the provided information, A decade-old study found that the proportion of high school seniors…

Q: Are Republicans less likely than Democrats to display the American flag in front of their residence…

A: Given: Sample sizes: n1=600n2=661 Number of Republicans who display the American flag X1=418 Number…

Q: In a separate experiment, a significance test was performed to test the null hypothesis `H_o`: `\mu`…

A: From the provided information, Sample size (n) = 81 The hypotheses are as follow: H0: µ = 24.56 Ha:…

Q: Recently, a large academic medical center determined that 13 of 22 employees in a particular…

A:

Q: According to a recent​ report, 46​% of college student internships are unpaid. A recent survey of 80…

A: State the hypotheses.

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

A: a) Denote p as the true proportion of guests who catch pike over 20 pounds.

Q: Arandom sample of 820 births incduded 431 boys. Use a 0.05 significance level to test the claim that…

A: We have find givan hypothesis....

Q: Previously, an organization reported that teenagers spend 4.5 hours per week, on average, on the…

A: Solution-: Given: n=15,μ=4.5,x¯=4.75,s=2.0 (a) We identify hypothesis (b) Conduct the hypothesis…

Q: A researcher conducts a study measuring 15 children before and after they attend a math intervention…

A:

Q: A local police chief claims that about 22% of all drug related arrests are ever prosecuted. A sample…

A: The known values are, The null and alternative hypothesis is, Level of significance, The value of…

Q: A business journal investigation of the performance and timing of corporate acquisitions discovered…

A:

Q: In 2000, the mean math SAT score for students at one school was 472. Five years later, in 2005, a…

A:

Q: Based on certain data, a null hypothesis is rejected atthe 0.05 level of significance. Would it also…

A: Concept of p-value: The p-value in hypothesis testing is the probability of obtaining a test…

Q: The body weight of a healthy 3-month-old colt should be about u = 66 kg. (a) If you want to set up a…

A: From the provided information, Population mean (µ) = 66 kg

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

A:

Q: a) Write the null hypothesis and the alternative hypothesis. b) Based on the sample mean, the salmon…

A: The provided sample mean is Xˉ=0.07\bar X = 0.07 and the sample standard deviation is s=0.02s =…

Q: Is there an association between daily screen time and exercise habits in high school students? Mia…

A: Null Hypothesis : It is always setup to nullify the consider relationship Alternative Hypothesis: it…

Q: A decade-old study found that the proportion of high school seniors who felt that "getting rich" was…

A: It is a two-tailed test.

Q: Last year the mean cost u for a one-bedroom rental in a certain city was $1,200 per month., Eli is…

A: The summary of statistics is, x¯=1180,μ=1200 Let μ denote the mean for a one bed room rental in a…

Q: If, in a​ one-tail hypothesis test where H0 is only rejected in the upper​ tail, the p-value=0.6792…

A: Given information: In a​ one-tail hypothesis test where H0 is only rejected in the upper​ tail, the…

Q: A decade-old study found that the proportion of high school seniors who felt that "getting rich" was…

A: In this context, it is given that the proportion of high school seniors who felt that “getting rich”…

Q: In 1945, an organization asked 1480 randomly sampled American citizens, "Do you think we can develop…

A: The random variable X follows normal distribution. We have to test whether a majority of the…