state your interval, supporting work and conclusion: a survey of 1000 boat owners found that 12% of the boats were named serenity. find the 95% confidence interval of the true proportion of boats named serenity

Q: Find the population mean or sample mean as indicated. Sample: 24, 17, 2, 12, 25 Select the correct c...

A: Given samples are 24,17,2,12,25

Q: In the old days, there was a probability of 0.8 of success in any attempt to make a telephone call. ...

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Q: Random samples of female and male UVA undergraduates are asked to estimate the number of alcoholic d...

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Q: A random sample of 12 second-year university students enroled in a business statistics course was dr...

A: The appropriate hypothesis are H0:μ=24H1:μ<24 (Because the recommended hours for 12 weeks will be...

Q: 12. You have three red cards numbered 1, 2, 3 and two orange cards numbered 1, 2. Finding the follow...

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-pa...

Q: Plzz explain.

A: From Given Information  To test: H0:σ12=σ22VersusH1:σ12≠σ22

Q: The management of a supermarket wants to adopt a new promotional policy of giving free gift to every...

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case yo...

Q: In a local college, 70% of students have a part-time job outside of school. Suppose that we want to ...

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Q: Tasty Pizza Ltd desires to know if the size of the pizzas order by their customers depends on the to...

A: Given information: It was stated that tasty Pizza Ltd desires to know if the size of the pizzas ord...

Q: (1) Let X = b(16,) find E(4-3x) and distribution function.

A: From the provided information, X~b (16, 1/4) Sample size (n) = 16 Probability (p) = 1/4

Q: Find the 95% Confidence Interval for the following problems: a. 1.11+(2*0.01550)=1.141 1.11-(2*0.015...

A: the 95% confidence interval is  mean ±α95%σnmean ±2*σn 95% confidence Z value taken 1.96 as 2  

Q: Falcon Air is a small commuter airline. It uses a type of plane that has only 9 passenger seats. Pas...

A: Binomial distribution: Consider a random experiment involving n independent trials, such that the ou...

Q: describe a probability distribution.

A: We have to check whether the Given Formula of P(x)  is Probability Distribution or not, We know that...

Q: Find the sample variance and standard deviation for the following sample. Round the answers to two d...

A:   x (x-x) (x-x)2 15 -4 16 30 -15 225 21 -6 36 19 0 0 10 -9 81 x = 19   358

Q: A study was conducted at a local college to analyze the average cumulative GPA of students who gradu...

A: parameter -  to describe the entire population being studied.

Q: Based on this sample, plausible values of u, the true mean annual cosmic radiation exposure for all ...

A: xbar = 3.07 sigma = 0.35 n = 100  z = 1.645

Q: A study was conducted at a local college to analyze the average cumulative GPA of students who gradu...

A: " the average cumulative GPA of students in the study who graduated from the college last year " des...

Q: Express the confidence interval 49.8%<p<67.6%49.8%<p<67.6% in the form of ˆp±Ep^±E.

A: Here we need to express the given confidence interval in the form p+/-E.

Q: on a multiple choice test with 20 questions, each question has 4 possible answers, one of which is c...

A: We have to find mean  for students who guess at all  correct answers..

Q: What are the values of u; and o; for the sampling distribution of the sample mean shown? 320 340 360...

A:

Q: A study found that the mean amount of time cars spent in​ drive-throughs of a certain​ fast-food res...

A: X follows a Normal distribution with mean = 157.6 and S.D = 32 Then z=(x-mean)/SD = (x-157.6)/32  ...

Q: Let X  be a continuous random variable, then which of the following are necessarily true:   selecta...

A: Here, it is required to find the conditions that are true.

Q: p. Factory Output A manufacturing company has three factories: X, Y, and Z. The daily output of each...

A: (a) Obtain the probability that item selected at random was manufactured at factory X or is a stereo...

Q: The lengths of a professor's classes has a continuous uniform distribution between 50.0 min and 52.0...

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Q: A random sample of 100 observations from a population with standard deviation 8.23 yielded a sample ...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a ti...

Q: Find the​ Z-scores that separate the middle 33​% of the distribution from the area in the tails of t...

A: In this case, the mean is 0 and the standard deviation is 1.

Q: Suppose the scores of students on an exam are normally distributed with a mean of 444 and a standard...

A: We have to find limits that include 68% data. 

Q: The mean salary offered to students who are graduating from Coastal State University this year is $2...

A: Given that the mean = $24,230                         standard deviation = $3712                    ...

Q: Use the sample data and confidence level given below to complete parts​ (a) through​ (d).   In a stu...

A: Solution: Given information: n= 2670  Sample size of subjects  x= 1149 subjects were returned  p^=xn...

Q: create a 90% confidence interval for the following data:  x = 25 n = 100

A: Here we need to construct a 90% confidence interval.

Q: The heights of 1,000 college students are normally distributed about a mean value of 170 centimeters...

A: Given : sample size (n)=1000Mean (μ) =170standard deviation (σ)=7.2 X follows normal distribution  Z...

Q: If six black, five red, four white, and two green disks are to be arranged in a row, what is the num...

A: Permutation: the permutation is determining the number of possible arrangements in a set when the or...

Q: List two unbiased estimators and their corresponding parameters

A: Unbiased estimators: A statistic T is said to be unbiased estimator of the parameter θ if E (T) = θ ...

Q: Suppose that X, Y, and Z are jointly distributed random variables, that is, they are defined on the ...

A: Since, you have you have posted a question with multiple subparts we will solve first three subparts...

Q: A recent study claims that 40% of registered voters associate themselves with Democrats. 35% with Re...

A: There are 5 cases which are named as democrats, republicans, independent, green party and social dem...

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe t...

A: The population mean CI, for any assumed population standard deviation, X¯±Margin of Errorwhere Margi...

Q: 50% of AUA students prefer to have lunch at cafeteria. Suppose you take a sample of 100 AUA students...

A: Given : 50% of AUA students prefer to have lunch at cafeteria. Suppose you take a sample of 100 AUA ...

Q: Tasty Pizza Ltd desires to know if the size of the pizzas order by their customers depends on the to...

A: As per our guidelines, we are allowed to answer three sub-parts only. Thanks i. Define the null and ...

Q: Aisha wants to advertise how many chocolate chips are ineach Big Chip cookie at her bakery. She rand...

A: Solution: Given information: n= 71 Sample size  x= 18.9 Sample mean s= 2.3 Sample standard deviation...

Q: If random samples, each with n = 16 scores, are selected from a normal population with µ = 100 and σ...

A: Here, the known values are n = 16,µ = 100 and σ = 20.

Q: The mean annual earning for U.S. workers with advanced degrees is $80,977 with a standard deviation ...

A: Hi! Thank you for posting the question. Since you have posted multiple questions, we are answering f...

Q: You are interested in finding a 90% confidence interval for the average commute that non-residential...

A: Here we need to construct a 90% confidence interval.

Q: Matt thinks that he has a special relationship with the number 2. In particular, Matt thinks that he...

A: The given claim is that the number 2 comes up more often when a 6-sided die is rolled.

Q: If A and B are mutually exclusive events with P(A) = 0.295, P(B) = 0.32, then P(A | B) =

A:

Q: A regression was run to determine if there is a relationship between hours of study per week (xx) an...

A: The regression is y-hat = a+bx = 33.15+5.525x

Q: For a standardized psychology examination intended for psychology majors, the historical data show t...

A: From the given information,   Mean = 520 Standard deviation = 180 Sample size = 35   The objective i...

Q: A researcher claims that the average wind speed in a certain city is 8 miles per hour. A sample of 3...

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Q: r two continuous random variables X and Y with joint pdf f(x,y):

A: Hello, since your question has multiple parts, we will solve the first question for you. if you want...

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.