Show work please You want to create a 95% confidence interval with a margin of error of no more than 0.05 for a population proportion.  The historical data indicate that the population has remained constant at about 0.55.  What is the minimum size random sample you need to construct this interval?   223 378 381. 324 380 If the sample size for the computation of a 1-population confidence interval were tripled, how would this change the confidence interval size?   Triples the interval size Divides the interval size by 3. Mutliplies the interval size by 1.732. Divides the interval size by 1.732 Multiples the interval size by 9.

Q: You plan to take a random sample from a population of 500 items and build a 95% confidence interval…

A: We have given that Standard deviation(σ) = 100Margin of error (E) = 5Significance level (α) = 1 -…

Q: A random sample of 10 parking meters in a resort community showed the following incomes for a day.…

A:

Q: You intend to estimate a population mean with a confidence interval. You believe the population to…

A: Sample size (n) = 63 Degree of freedom = n – 1 = 63 – 1 = 62 Confidence level = 81.2% Level of…

Q: 100 samples were obtained from a normal population with means ? = 50 and variance ? = 4. For each…

A: Given Population mean, μ=50 Population variance, σ2=4 Sample size, n=100

Q: A simple random sample of IQ scores is selected from a normally distributed population of statistics…

A: We have given that,   sample mean (x̄) = 131, sample standard deviation (s) = 11 and sample size (n)…

Q: True or false? Given that a confidence interval for µ is 13 +   The value of 13 in this expression…

A: Confidence interval for  is 13+

Q: 3. Find the values for xỉ and x (critical values) for a 80% confidence interval when n=12

A: We have to find value using chi square table.

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: From the provided information, Margin of error (E) = 3 Standard deviation (s) = 14.9 Confidence…

Q: asing the sample size will increase the precision of estimation of the confidence interval on the…

A: Confidence Interval :                              Let x1,x2,x3,....xn be a random sample from the…

Q: (c) Find a 90% confidence interval for the population variance. (d) Assume in the main problem…

A: The single mean t-test is used to compare the mean of a variable in a sample of data to a mean in…

Q: 95% of confidence interval of a population proportion is (0.64,0.84) What is the margin of error.…

A: Answer: From the given data, 95% of confidence interval of a population proportion is (0.64, 0.84)…

Q: A simple random sample of size n= 40 is drawn from a population. The sample mean is found to be x=…

A: It is given that sample mean is 121.7 and the standard deviation is 13.2.

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A: Here, n=36, x=65.9,  s=4.3, and CL = 0.95. Note that the standard deviation of population is…

Q: Construt a 90% confidence interval of the population proportion using the given information . ×=40,…

A:

Q: If the variance of the water temperature in a lake is 29°, how many days should the researcher…

A: Solution: From the given information, confidence level is 0.95, σ2=29 and E=4.

Q: If all other quantities remain the same, how does the indicated change affect the width of a…

A: We have given that the some quantity and here need to find out the affect on the width of confidence…

Q: you want to obtain a sample to estimate a population mean. based on previous evidence, you believe…

A:

Q: You are analyzing a confidence interval using a 99% confidence level in your analysis. You collect a…

A: Introduction: It is required to construct the 99% confidence interval of the unknown population…

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A: Given95% confidence interval N=361 x = 59.1 seconds. z= 4.9 SecondsFind the margin of error?

Q: If n = 570 and X = 456, construct a 90% confidence interval for the population proportion, p.Give…

A:

Q: Determine the point estimate of the population mean and margin of error for the confidence interval.…

A: 1. The point estimate of the population mean will be the average of the two bounds. Hence, the point…

Q: Current Attempt in Progress Use the t-distribution to find a confidence interval for a difference in…

A: want to calculate an exact estimate, the margin of error, and the confidence interval for the…

Q: The minimum sample size required to construct a 95% confidence interval is 69 servings. und up to…

A: According to the given information in this questionwe need to answer part b

Q: The width of a confidence interval estimates for a population mean when the population standard…

A: ANSWER: For the given data,

Q: Goofy Marketing Solutions conducted a survey among 16 randomly selected visitors to the newly opened…

A: The random variable satisfaction score follows normal distribution. We have to construct 95%…

Q: Construct an 80% confidence interval estimate for the population mean given the values below. a=47 n…

A:

Q: If n=29, x¯(x-bar)=35, and s=12, construct a confidence interval at a 95% confidence level. Assume…

A: n = 29x¯ = 35s = 12

Q: Construct a 90% confidence interval of the population proportion using the given information. x=…

A:

Q: Suppose you want to do a confidence interval for the mean age of your clients when X has a normal…

A: Given that, Critical values: Using the z-table, the critical value at 95% confidence level is

Q: Question 1: What is the confidence interval for the population mean μ​?   _____hg <μ<_____ hg…

A: Given Information: n = 220  x = 27.5 hg s = 7.4 hg

Q: If n=28, ¯xx¯(x-bar)=48, and s=13, construct a confidence interval at a 99% confidence level. Assume…

A:

Q: If X= 148, a=25, and n=38, construct a 99% confidence interval estimate of the population mean, μ.…

A: Sample size n = 38 Sample mean x̅ = 148 Population standard deviation σ = 25 Significance level(α) =…

Q: 5. Which one of the following statements about a confidence interval is TRUE? Changes in the…

A:

Q: Length of a confidence interval. Which confidence interval would be shorter, a confidence interval…

A: We know that, margin of error is given by, ME= Z* sigma/√n Marginal of error is inversely…

Q: Thumbs up if you can solve in a few minutes 1- Find the required sample size for calculating a 95%…

A:

Q: Determine the point estimate of the population proportion, the margin of error for the following…

A: (1-α)% CI for p is          p^-Zα/2p^(1-p^)n≤p≤p^+Zα/2p^(1-p)^n Lower bound≤p≤ Upper bound Lower…

Q: Construct a 99% confidence interval to estimate the population mean using the data below. What…

A: The sample size is ,  and .

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

A: Sample size(n)=45 Mean(x¯)=$6.47 Population standard deviation(σ)=$2.00…

Q: A decision maker is interested in estimating the mean of a population based on a random sample. She…

A: Given: Margin of error = E = ± 0.50 ∝ = 0.05 From the given data we compute the mean and variance as…

Q: If you wish to estimate a population mean with a sampling distribution error SE-0.24 using a 95%…

A: The question is about sample size estimation.Given :SE = 0.24Confidence level ( C ) = 0.95Population…

Q: Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a)…

A: From the given information, the population standard deviation is not known. Hence, we can use t…

Q: A simple random sample of size n= 12 is drawn from a population that is normally distributed. The…

A: Solution The population standard deviation is unknown ,so we will use t distribution to calculate…

Q: Assume that you want to construct a​ 95% confidence interval estimate of a population mean. Find an…

A: From the given information, the standard deviation is 65.6, the confidence level is 95% and the…

Q: #1-3: In a hospital, two different departments give surveys to measure the satisfaction of patients.…

A: Degrees of freedom in this case is given by nA-1 = 125-1 = 124 For department A the 99% CI is given…

Q: Construct a 90​% confidence interval to estimate the population mean using the data below. What…

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 21 for the population…

A: Mean = 100 Standard deviation = 21 95% confidence level

Q: If n=520 and ˆpp^ (p-hat) = 0.4, construct a 98% Confidence Interval. In order to use technology,…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.