You are told that the proportion p-hat  of those who answered "yes" to a poll about internet use is p-hat = 0.70, and the standard error of the proportion is 0.0458. What was the sample size?

Q: A lottery offers one $800 prize, two $700 prizes, three $400 prizes, and four $200 prizes. One…

A: Given information:$800 prize = 1$700 prize = 2$400 prize = 3$200 prize = 4

Q: C2. Let X be a random variable. (a) Let YaX be another random variable. What is EY, in terms of μ =…

A:

Q: Consider the following table in reference to a hypothesis test: Ho True Ho false (1) (3) Accept Ho…

A: Given, H0 TrueH0 falseAccept H0(1)(2)Reject H0(3)(4)

Q: Find the margin of error for the given values of c, s, and n. c=0.90, s= 3.5, n = 6 Click the icon…

A: Given, c=0.90, S=3.5 and n=6

Q: The state test scores for 12 randomly selected high school seniors are shown on the right. Complete…

A: The number of observations is 12.a) The formula for finding the mean is shown below:The mean is…

Q: A certain flight arrives on time 85 percent of the time. Suppose 159 fights are randomly selected.…

A: A certain flight arrives on 85% of the time.p=0.85Number of flights randomly selected is n=159.

Q: Study the information provided below and answer questions 12 to 16. The data in Table C below…

A: The data in the below table represents a portfolio of five shares held by an individual investor at…

Q: Suppose that the average price for a gallon of gasoline in the Country A is $2.74 and in Country B…

A: For country AMean()=2.74standard deviation()=0.25For country BMean()=2.40standard deviation()=0.20

Q: 2. Find the correlation between the respondent's gender (male = 1, female = 0) and their opinion…

A: As per our Q&A guidelines, we can answer three questions only. For remaining questions to be…

Q: Consider the computer output below. Fill in the missing information. Round your answers to two…

A: Given information:

Q: According to the Empirical Rule. Find specified probability. (Round to FOUR decimal places. Write…

A: Here it is required to find the probability, P(0.78<Z<2.64)The Empirical rule: The empirical…

Q: A college entrance exam company determined that a score of 20 on the mathematics portion of the exam…

A: The random variable is score.We have to test whether the population mean is larger than 20 or…

Q: Compute the leverage values for these data, using data from all 22 car models. Which car has the…

A: Consider Y be the highway mileage and X be the city mileage then the data on X and Y is given as…

Q: Q 6.2. Let X = (X₁, X2, X3)¹ ~ MVN (ux, Ex) where -3 7²) μχ = Compute the distribution of Y and Ex =…

A:

Q: I am playing a gambling game. On each play, I have a 10% chance of winning $12, a 30% chance of…

A: There is 10% chance of winning $12.A 30% chance of breaking even i.e., not winning or losing any…

Q: K The table below shows the amounts of crude oil (in thousands of barrels per day) produced by a…

A: From the information, given thatLet X denotes the oil produced as independent variableLet Y denotes…

Q: The average fruit fly will lay 377 eggs into rotting fruit. A biologist wants to see if the average…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: A hospital wishes to justify the benefits of nutrition programs for pregnant women using birth…

A: The data of 14 pregnant women was given in which 7 women were provided nutrition and 7 did not.They…

Q: You wish to determine if there is a linear correlation between the age of a driver and the number of…

A: The total number of pairs of observations is n = 8.Suppose the Driver Age is defined as x and the…

Q: Suppose X₁ and X₂ are i.r.v. and come from gamma(2a, 2). Show that U = X₁ + X₂ comes from gamma(4a,…

A: Given that X1 and X2 are i.r.v. from a gamma distribution.want to show that U=X1+X2 comes from a…

Q: The secretary of an association of professional landscape gardeners claims that the average cost of…

A: From the provided information,

Q: In randomized, double-blind clinical trials of a new vaccine, rats were randomly divided into two…

A: The question is about hypothesis testing.Given :Total no. of subjects in the group 1 ( n1 ) = 699No.…

Q: nstruct a 95% upper bound on the difference in means μ1 − μ2. Please report your answer in 2 decimal…

A: Answer Given The sample mean [x1] = 9The sample mean [x2] = 24The sample size = n1=n2 =20The…

Q: There are 20,000 eligible voters in Marion County, South Carolina. A random sample of 500 voters…

A: A random sample of 500 voters revealed 330 plan to vote for Tim Scott for Senatei.e. Let X be the…

Q: Date Nov. 2 3 4567 Number Inspected 531 1393 1422 1500 1250 2000 Num Defecti 4

A: Find the mean , sd , rnge and using these we can find control limits usign the formula

Q: hat is your favorite color? A large survey of countries, including the United States, China, Russia,…

A: level of significance α = 0.05.

Q: Use the values on the number line to find the sampling error. 1 = 25.02 25 The sampling error is 26…

A: Population is the set of all objects of interest. The sample is a subset of the population.

Q: How much money do winners go home with from the television quiz show Jeopardy? To determine an…

A: 314453008122151135771293428082217241706015596149653144115773220513177812500

Q: In a random sample of 8 people, the mean commute time to work was 36.5 minutes and the standard…

A: From the provided information,A 90​% confidence interval using the​ t-distribution was calculated to…

Q: Suppose that the hospital administrator wants to follow a policy that results in stockouts only 10%…

A: let X be random variable denoted as stocks a “code blue” resuscitation kit. and it is normally…

Q: A random sample of 10 chocolate energy bars of a certain brand has, on average, 240 calories per…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: continuous random variables Z is known to have an Erlang (2,1.3) type PDF. what is the variance of Z

A: Given that Z is a continuous random variable having a distribution Erlang with parameters (…

Q: A family of random variables has MGF ψ(t) = eat2 , t ∈ R, where the value of a is a parameter…

A: The given data is as follows:The MGF is .

Q: A manufacturer of potato chips would like to know whether its bag filling machine works correctly at…

A: Claim is that the mean of bag filling machine is less than 410sample size(n)=16Mean()=402standard…

Q: A random sample of 19 shearing pins is taken in a study of the Rockwell hardness of the pin head.…

A: The random sample of shearing pins, The sample mean, The sample standard deviation, The confidence…

Q: If n=18, (x-bar)=35, and s-11, construct a confidence interval at a 80% confidence level. Assume the…

A: The sample size is .The sample mean is .The sample standard deviation is The confidence level is…

Q: A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from…

A: It is given that the t-value is 44.

Q: A hospital claims that the mean number of latex gloves used per day by all hospital employees is…

A: Given, the claim is that the mean number of latex gloves used per day by all hospital employees is…

Q: An interactive poll found that 312 of 2,282 adults aged 18 or older have at least one tattoo. (a)…

A: In the poll it is found that 312 of 2282 adults aged 18 or older have at least one tatto.

Q: Investment Return Construct a probability distribution for the data and draw a graph for the…

A: The provided information is as follows:The probability of investment of $6000, $9000, $10,000, and…

Q: For a 4-units class like Statistics, students should spend average of 12 hours per week studying for…

A: Mean (x̅) = 13 hoursStandard deviation (s) = 3 hoursThe empirical rule, also known as the 68-95-99.7…

Q: Oasis Company bottles soft drinks using an automatic filling machine. When the process is running…

A: “Since you have posted multiple questions, we will provide the solution only to the first question…

Q: 3) You want to examine competition in barnacles. You examine two species and count the number of…

A: Given,we examine two species and count the number of each species at the low and high water marks…

Q: Below are ages of a random sample of professors at ELAC: 34 54 39 76 54 34 65 45 45 46 45 39 66 56…

A: Let X denote the ages of a random sample of professors at…

Q: f(x1, x₂) = x1 0 < x2 < x₁ < 1, otherwise. 21(i.) Sketch(Shade) the support of (X₁, X2). 21(ii.)…

A: Given that,The joint probability density function of  and  is given as:

Q: (b) n=1, p=0.56, X=0 P(X) = [ Xx ←

A:

Q: An educator wants to determine whether a new curriculum significantly improves standardized test…

A: 1) The sampling would be considered independent because the selection of individuals in one group…

Q: According to data released by New Town Chamber of Commerce, the weekly wages of office workers have…

A: Sample mean=$750population mean=$723Standard deviation=$151sample size=57

Q: For each of the following charts: stem-and-leaf diagram, box-and-whisker diagram, bar chart and…

A: Given the summarized data as:Level of Employee moraleNumber of Employees0 - 283 - 4265 - 6407 - 8189…

Q: A manager wishes to determine whether the mean times required to complete a certain project differ…

A: Given information:k=3 treatments or groups Each group has 8 observations.n=3*8= 24 Total…