Suppose a random sample of n = 350 teenagers 13 to 17 years of age was asked if they use social media. Of those surveyed, 280 stated that they do use social media. Find the sample proportion of teenagers 13 to 17 years of age who use social media. The sample proportion is p = (Round to three decimal places as needed.) ...

Q: the answer you provided was wrong

A: 61% of the people have been vaccinated.

Q: It's recommended 10 urine tests to be done by each student over the following month, then this…

A: Let X be the Population which follows normal distribution The Population mean is, μ=15The…

Q: Accounting procedures allow a business to evaluate its inventory costs based on two methods. LIFO…

A: From the provided information,Sample size (n) = 5The difference is as follow:d = FIFO-LIFO821-12104

Q: A post office is run by two clerks. When Smith enters the system, he finds that Jones is being…

A: A post office is run by two clerks. When Smith enters the system, he finds that Jones is being…

Q: A population of values has a normal distribution with u random sample of size n = 53. = 169.8 and o=…

A: Given,Mean, μ = 169.8Standard deviation, σ = 49.7Sample size, n = 53

Q: 3. A statistics tutor wants to assess whether her remedial tutoring has been effective for her 10…

A: We are given data as,BeforeAfter6.28.17.78.58.39.75.97.97.39.98.88.07.97.85.57.67.49.56.96.9i)…

Q: Provide the null and alternative hypotheses used to address these problems. Make sure that your…

A: Given claim: On average, is repair time for a particular subassembly more than two hours.Claim:

Q: Consider the roulette wheel game where a player bets $1 on the ball land- ing on a single number…

A: Player bets $1.There  are total 38 numbered pockets.If the ball lands on their number they receive…

Q: According to a study on the effects of smoking by pregnant women on rates of asthma in children, for…

A: n= 319 no of children developed asthma = x = 82Population proportion of children who developed…

Q: what is the interpretation of the slope? What is the interpretation of the intercept?

A: y^=21000+0.2xslope = 0.2 and intercept = 21000Y=annual salary( Dollar)X=year worked

Q: d. a simple random sample of 40 auto insurance policies, find the probability that the average cost…

A: From the information, given thatlet X denotes the cost which follows normal distribution with the…

Q: Η : μ > 27,2, Η : μ < 27.2 n = 31 test statistic = -0.93 p-value: conclusion w.r.t. Ho:

A: Suppose μ is the population mean.

Q: Suppose that the probability that a passenger will miss a flight is 0.0937. Airlines do not like…

A: Solution-:Given: The  that a passenger will miss a flight is 0.0937 and n=54We want to find,(a) If…

Q: 3) A college wants to see if there is a significant difference in the amount of time an average…

A: From the provided information,Hypotheses:

Q: Suppose you want to evaluate the effectiveness of a job training program using Y = Bo + B₁X₁ + u as…

A: We have given a two regression model.where Y is hourly wage is dollarsX1 =1 if employee participates…

Q: (b) Find E(X). Find Var(X). otherwise.

A: Pdf of X is f(x)=132(8−x) , 0 ≤ x ≤ 8.

Q: Each of the following is a confidence interval for μ = true average (i.e., population mean)…

A: Given confidence interval for population mean (μ) are,(110.6, 111.4) And (110.4 , 111.6)

Q: A bike sharing program recorded meteorological factors as part of efforts to understand factors…

A: The paired observation for the bike usage and the temperature is given as…

Q: According to a Pew Research Center study, in May 2011, 33% of all American adults had smart phone…

A: p=0.33, n=352, X=122

Q: Provide the null and alternative hypotheses used to address these problems. Make sure that your…

A: Given claim:The proportion of defects in component parts produced by Supplier C is different than…

Q: A population of values has a normal distribution with u = 25.2 and o= 46.1. You intend to draw a…

A: Given,Mean, μ = 25.2Standard deviation, σ = 46.1Sample size, n = 80Let X be a random variable…

Q: A: (In image) B: fit a quadratic regression model and state the quadratic regression equation C:…

A: a:The scatter-plot of the given data is obtained as: Hence, Option A. is the correct Option.B.The…

Q: Express the confidence interval 68.7% 8.1% in the form of a trilinear inequality. % <p<\ Question…

A: Given Express the confidence interval 68.7%±8.1%

Q: Approximately 20.5% of the U.S. population 5 years old and older speaks a language other than…

A: sample size is 400 &amp; Population Proportion =0.205

Q: The mean output of a certain type of amplifier is 161 watts with a standard deviation of 10 watts.…

A: Given,Mean, μ = 161 watts.Standard deviation, σ = 10 watts.Sample size, n = 53

Q: Using all 1991 birth records in the computerized national birth certificate registry compiled by the…

A: Suppose the random variable x defines the birth weight of infants.

Q: The following are observations (x₁, y;) taken from units in a textile process: (12,12), (12,17),…

A: Given the observations  taken from units in a textile process:

Q: Machines are sent to a repair shop where three mechanics work. The mechanics can repairmachines…

A: The objective of this question is to find the average time it will take to fix all the machines and…

Q: An article reported that for a sample of 54 kitchens with gas cooking appliances monitored during a…

A: The sample size is 54, the sample mean is 654.16 and the sample standard deviation is 163.36.

Q: What is an example research project in which a one-sample Z-test would be appropriate? Write out, in…

A: z-test:For large sample sizes almost all distributions Binomial, Poisson, Negative Binomial,…

Q: The capacities at which U.S. nuclear power plants are working as shown in the table for various…

A: Let f(t) be the capacity (in person) at which U.S. nuclear power plants have been working for years…

Q: A survey asked senior executives at large corporations their opinions about the economic outlook for…

A: From the provided information,

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: The question is about sampling distribution.Given :Population mean length of steel rods (  ) = 211.4…

Q: Good credit: The Fair Isaac Corporation (FICO) credit score is used by banks and other lenders to…

A: SolutionSample size = n= 50Sample mean = 765Sample sd = s = 98HypothesesHo: μ =720H1:  &gt; 720

Q: Let us suppose that a particular lecturer manages, with probability 1, to develop exams that have…

A: Given information:

Q: he General Social Survey asked a sample of  1313  people how much time they spent watching TV each…

A: The objective of this question is to test the sociologist's claim that people watch a mean of 3…

Q: dogs weights, and a mean weight of 39 ounces. Assume the population standard deviation is 9.6…

A: Given sample size n=41mean = 39population standard deviation level of significance

Q: The authors of a certain paper describe a study to evaluate the effect of mobile phone use by taxi…

A: The formula of the confidence interval is,where, denotes the sample mean denotes the critical values…

Q: Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value.…

A: The regreesion equation is .

Q: A country's tax collection agency reported that 82% of individual tax returns were filed…

A: From the provided information,Confidence level = 95%

Q: Suppose that the test score of a student taking the final of a probability course is a random…

A: Chebycheve's Inequality

Q: A leading magazine (like Barron's) reported at one time that the average number of weeks an…

A: n=38

Q: Use the information below to answer the questions. Round calculations to 3 decimal places. Let p be…

A: The objective of the question is to calculate the point estimates for p and q, and to construct the…

Q: The following estimated regression equation based on 10 observations was presented. ý = 29.1270 +…

A: Note:-“Since you have posted a question with multiple sub parts, we will provide the solution only…

Q: A team of researchers wants to investigate a relationship between students' self-esteem (variable X)…

A: Sample size The independent variabe is students' self esteem.The dependent variable is psychological…

Q: Traditional Students (G1) Online Students (G2) mean 2.97 2.95 standard deviation 0.34 0.35 sample…

A: Let X1 be the traditional students and X2 be the online students.Given,.

Q: 0 18 13 30 23 18 A data set contains the six values. What is the population standard…

A: The data set is 10,18,13,30,23,18sample size(n)=6

Q: A quality control engineer at a potato chip company tests the bag filling machine by weighing bags…

A: The given data is as follows:Sample size, Number of bags which are over filled, The hypothesis is

Q: You work for a marketing firm that has a large client in the automobile industry. You have been…

A: margin of error (E) = 0.03The sample size for proportion is given by,

Q: For each statement, express the null hypothesis ?0H0 and alternative hypothesis ?1H1 in symbolic…

A: The objective of the question is to identify the correct null hypothesis (H0) and alternative…