In 2014, the Centers for Disease Control and Prevention reported the percentage of people 18 of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of 0.30. a. How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of 0.02? Use 95% confidence. Remove all commas from your answer before submitting. Round your answer to next whole number. b. Assume that the study uses your sample size recommendation in part (a) and finds 520 smokers. What is the point estimate of the proportion of smokers in the population? (to 4 decimals) c. What is the 95% confidence interval for the proportion of smokers in the population? (to 4 decimals) X X

Q: Samples of plastic product were selected from a batch of material, and the tensile strength in kg…

A: The question is about one way ANOVA Given :

Q: The purpose of a confidence interval is: O To test a claim about a population parameter. To find a…

A: It is needed to find the purpose of confidence interval.

Q: Let X₁, X₂,...,Xn be a random sample of size, n from a normal distribution with mean, and variance,…

A:

Q: An automotive corporation claimed that their sedan brand of car can travel an average mean of 35 km…

A:

Q: 23. Busy Bank Tellers. The Prescott National Bank has six tellers available to serve customers. The…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: Use the provided randomization distribution (based on 100 samples) to estimate the p-value for this…

A:

Q: n a​ poll, 37​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: The following information has been given: Sample Proportion : p^=0.37 Margin of error : E=0.05

Q: Find the area of the shaded region under the standard normal curve. If convenient, use technology to…

A: The mean or average on a standard normal curve lies in the center of the curve. The mean, median,…

Q: Your teacher recently found an old Nintendo in a thrift store. Use the formula to predict the value…

A: Regression equation are used to predict the future value. It explains the relationship between the…

Q: Aaliyah is 74 years old. Based on a normal distribution with mean 47.8 and standard deviation 12.6,…

A: GivenAaliyah is 74 years oldx=74Mean(μ)=47.8standard deviation(σ)=12.6

Q: Watch your cholesterol: The mean serum cholesterol level for U.S. adults was 202, with a standard…

A:

Q: is certified by the Snell Memorial Foundation, a not-for-profit organizat ds. Snell "SA" (Sports…

A: * Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts…

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A:

Q: A parenting magazine reports that the average amount of wireless data used by teenagers each month…

A: The question is about hypo. testing Given : Popl. mean amount of wireless data used by teenagers ( μ…

Q: For parts (d), (e), and (f), convert the z intervals to x intervals. (For each answer, enter a…

A: The mean is 27.1 and the standard deviation is 4.

Q: est statistic = What is the p-value for this sample? (Report answer accurate to four decimal…

A: Given that number of successes 313 out of 606 samples and 357 successes out of 564

Q: Assume the mandom Variable X is normally distributed with mean μ-30 and standard deviation 0-7.…

A: GivenMean(μ)=50standard deviation(σ)=7

Q: Determine the probability mass function of X. Use the probability mass function to determine the…

A:

Q: A set of measurements X has a mean of 7 and standard deviation of 0.2 for simplicity, a linear…

A: Mean of X = 7 Standard deviation of X = 0.2 Linear transformation Y = a X  + b Mean of Y = 1…

Q: = X 3 4 5 6 7 y 18.66 20.18 21.4 22.22 21.44 X +

A: The given data is x y 3 18.66 4 20.18 5 21.4 6 22.22 7 21.44 8 23.56 9 22.28 10…

Q: If you fail to reject the null hypothesis when it is, in fact, false; what type of error is this…

A: In statistical hypothesis testing, we have two types of errors. 1. Type I error 2. Type II error

Q: A gambler complained about the dice. They seemed to be loaded! The dice were taken off the table and…

A: Given: n = 300 Formula Used: Test-statistic χ2 = ∑(O-E)2E Where O = Observed value E = Expected…

Q: 1. Perform a Two-Way ANOVA using the dataset (Sheet name: Prosthetic). Copy the result of the…

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

Q: A simple random sample from a population with a normal distribution of 99 body temperatures has…

A:

Q: You wish to test the following claim (H) at a significance level of a = 0.01. H₂:μ = 62.9 Ηα:μ #…

A: Given data , n= 7 M= 70 SD= 13.6 Level of significant /  Alpha =  0.01 We have to find out test…

Q: A survey conducted by the American Automobile Association (AAA) showed that a family of four spends…

A: Given that: Population mean, μ=215.60 n = 64 x¯=252.45 s = 74.50

Q: A certain drug is used to treat asthma. In a clinical trial of the drug, 29 of 289 treated subjects…

A: We need to compute the z test statistic.

Q: How much do you study? A survey among freshmen at a certain university revealed that the number of…

A:

Q: How many ways can you roll 2 dice so that the sum of the dots is either 7 or 11?

A:

Q: Question: A rat is trapped in a maze. Initially he has to choose one of two directions. If he goes…

A: Given that: The rat can choose either left or right. If he goes to the right, then he will wander in…

Q: Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported…

A: Given data:   Current Year Previous year Occupied rooms 1512 1458 Total rooms 1800 1800

Q: The average prison sentence for a person convicted of second-degree murder is 14 years. If the…

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

Q: The Venn diagram below shows the 14 students in Ms. Henderson's class. The diagram shows the…

A:

Q: Use the provided randomization distribution (based on 100 samples) to estimate the p-value for this…

A:

Q: 3. A tailor designs dresses whose total amount of fabric require distributed with mean μ meter and…

A: Given that a sample of size 50 dresses is summarized as follows n=50 ∑x-3=45∑x-32=425

Q: Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported…

A:

Q: Calculate the test-statistic, t with the following information. n1 = 60, ₁ = 2.1, $₁ = 0.63 n2 = 55,…

A:

Q: 470 of Use tilraph de and graph to identify the value is given 485 500 کاک ( What is the 530 The…

A: From the given graph we know that μ=530μ+σ=545    .....(1)μ-σ=515    ......(2)

Q: 3. If a random variable has a symmetric distribution with mean 100 and variance 100, bound the…

A: The question is about chebyshev's theorem Given : Mean ( μ ) = 100 Variance ( σ2 ) = 100 So, std.…

Q: Make a scatterplot of the data. Then find an exponential, logarithmic, or logistic function f that…

A: Given: Here x and y data are given.

Q: A random sample of 16 chemists from Washington state shows an average salary of $41431 with a…

A: Given Data: Significance level = 0.01 Critical value = 2.454

Q: Calculate Q1, Q2, Q3, D1, D4, D5, D7, P10, P25, P50 and P70 for the following IQ scores: 87 90 95 96…

A: The total observation (score) present here is 23. Therefore, the size N is 23. The given…

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: According to the given information in this question  Mean is 0  Standard deviation is 1 We need to…

Q: Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an…

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

Q: What price do farmers get for their watermelon crops? In the third week of July, a random sample of…

A: From the provided information, Sample size (n) = 44 Sample mean (x̄) = 6.88 Population standard…

Q: Test the claim below about the mean of the differences for a population of paired data at the level…

A:

Q: Find the Value of Za 20.33 =

A: Answer: - Find the value of  Zα                   Z0.33   = ?

Q: 1. c) southwestern variable. True False The daily fuel consumption by a fleet of buses serving a…

A: Here we have to check whether given statement is true or false  " The daily fuel consumption by a…

Q: Mary took 4 courses last semester: Biology, Calculus, Spanish, and History. The means and standard…

A: The following information has been given: Subject Mean μ Standard deviation σ Mary's (X) score…

Q: Perform a Paired-Samples t-test using the recorded weight loss (pounds) for the 20 patients involved…

A: