is Let X~ Bin(378,p). Suppose we observed x = 249. Then, the 95% confidence interval for p (a) and the 99% confidence interval for Р is (b). To make the 95% confidence interval for p to be less than 0.05, we need the sample size n to be at least (c).

Q: You are comparing freshmen and seniors at your college on hours spent studying per day. You pick a…

A: First sample (male): x1-bar = 3, (s1)2 = 1.2, n1 = 11. Second sample (female): x2-bar = 2, (s2)2 =…

Q: if x x = 82, s = 3 and n = 36, give the lower confidence limit and the upper confidence limit, for a…

A: The upper limit of the confidence interval can be calculated using the formula: CIupper=x+zα·sn,…

Q: If the 95% confidence interval for a population mean from a certain sample is (-6.3, 4.5), then (а)…

A: Given that,95% C.I. for a population mean from a certain sample is (-6.3, 4.5)

Q: 4.) A random sample of 25 students obtained a mean of 78 and a variance of s = 15 on a college…

A: Givensample size(n)=25mean(x)=78variance(s2)=15confidence level(α)=98%

Q: A medical research worker intends to use the mean of a random sample of size n=120 to estimate the…

A: We have given that.Sample size (n) = 120Sample mean (x̅) = 141.8Standard deviations (σ) =…

Q: To test whether the failure rate of an exam is the same for both males and females, researchers…

A: Based on confidence interval we have to conclude about the difference between means if it's same or…

Q: Find the sample size for some finite and infinite population when the percentage of 4300 population…

A: It is given that, Population size, N=4300 Level of significance= 0.01. So. Zα = 1.28 Percentage of…

Q: If n=100 and p' (p-prime) = 0.18, construct a 99% confidence interval. Give your answers to three…

A: Givenn=100p^=0.18confidence interval = 99%

Q: I want to construct a confidence interval (CI) for estimating the population mean of IQ scores. I…

A: As per the solution the sampled observations are n=65

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

A:

Q: If n=27, ¯xx¯(x-bar)=39, and s=2, construct a confidence interval at a 95% confidence level. Assume…

A:

Q: Ten car drivers were asked to parallel park 2 cars having very different wheel bases and turning…

A: Sample sizen=10 The 90% confidence interval for the mean differences is [-2, 5].   At the 90% level…

Q: t*

A: Given Confidence interval for population mean=97% Sample size n=17

Q: Find only t* for the following cases (Round to 4 decimal places): (a) n = 18 and for 99% confidence…

A:

Q: The 87.19% confidence interval estimate for p was (0.2, 0.38). Find p′ and ME. pp′=  ME=

A: Given87.19% confidence interval estimate for p was (0.2 , 0.38)

Q: If n=14, ¯xx¯(x-bar)=44, and s=9, construct a confidence interval at a 98% confidence level. Assume…

A: Given data  ; n =14 , x̄ = 44 , Standard  deviation (s) = 9 To construct 98 % confidence interval.

Q: Suppose the daily numbers of visitors at the Grand Canyon national park are normally distributed.…

A: Solution: From the given information, the confidence interval for the population mean is (17124,…

Q: The following data represents temperatures for 2 cities (n = measurement days) (a) City 1: n1 = 15,…

A: Confidence Interval : The formula for the confidence interval of difference between two samples is…

Q: If n=13, ¯xx¯(x-bar)=31, and s=17, construct a confidence interval at a 99% confidence level. Assume…

A: Given data: Sample size, n = 13  Sample mean, x¯=31 Sample standard deviation, s = 17 The degree of…

Q: Use paired t-interval procedure to determine a 90% confidence interval for the difference between…

A: The data is (X, Y) = (49.3, 49), (43.2, 42), (50.4, 50), (36.3, 37), (52.3, 50)

Q: n=20n=20, ¯xx¯=47, and s=2s=2, construct a confidence interval at a 98% confidence level. Give your…

A: Cdd in

Q: calculate t value if df is 24 and  95% confidence interval

A: Given Information: Degrees of freedom df=24 Confidence level = 95% = 0.95 Significance level…

Q: What value of tn-1 would be used to construct a 99% confidence interval for the mean with a sample…

A: Givenconfidence level(c)=99%sample size(n)=17

Q: What is tα/2,df for a 95% confidence interval of the population mean based on a sample of 15…

A: Solution: We have to find the t-critical value (tα/2) at the given significance level 1- 0.95=0.05…

Q: Q1) Find the standard error for a sample. x= 450 and n = 600 when Q2) create a as%. confidence…

A: The given values are x=450 and n=600.

Q: If n=17n=17, ¯xx¯=35, and s=15s=15, construct a confidence interval at a 95% confidence level. Give…

A: It is given that the sample mean is 35 and the sample standard deviation 15.

Q: G3 We randomly select 100 fish from a reservoir and measure the length of them. The average length…

A: Given information: Sample size n=100 Average length of the fish x¯=33 cm Standard deviation of the…

Q: f n=29, ¯xx¯(x-bar)=48, and s=11, construct a confidence interval at a 99% confidence level. Assume…

A: Given data,n = 29x = 48s = 11D.f = n-1 = 29-1=28

Q: If n=580 and p' (p-prime) = 0.5, construct a 90% confidence interval. Give your answers to three…

A: The population proportion CI is,    p^±Zp^ (1-p^)nwherep^=sample proportionn=sample size

Q: 1. For each of the following confidence intervals for B,, (i) determine whether there is a linear…

A:

Q: True of False.  If a 90% confidence interval estimate for the population mean score of all Physics…

A: As per the honor code, We’ll answer the first question since the exact one wasn’t specified. Please…

Q: If n=31, ¯xx¯(x-bar)=45, and s=8, construct a confidence interval at a 99% confidence level. Assume…

A: Given: n=31x¯=45s=8

Q: An Independent sample from two different populations yields the following data. x̄1= 947,x̄2 =…

A:

Q: If n=21n=21, ¯xx¯=49, and s=17s=17, construct a confidence interval at a 99% confidence level. Give…

A: The summary of statistics is, n=21,x¯=49, s=17 The degree of freedom is, df=n-1   =21-1   =20…

Q: A student conducted a test to see if people preferred one of two possible new logos for UF, one with…

A: Confidence interval is a technique of estimation.

Q: The mean IQ for the entire population in any age group is known to be 100 with a standard deviation…

A: The random variable IQ follows normal distribution. The population standard deviation is 15. The…

Q: Suppose that the population of lengths of all fully grown male killer whales is approximately…

A: Given that Number of killer whales =10 Sample mean =7.241 Sample standard deviation =1.436 We have…

Q: You've collected a sample of 14 concrete blocks and weighed them. You want to produce a 99%…

A: Given that there are 14 concrete blocks.Let n = sample size = 14Confidence level is 99%.Significance…

Q: Let X1,X2,.,X, be a random sample from f(x;8) = 0e-nI(0,0)(x). Find a 100y or (1 - a)100 percent…

A: Given that,          Let X1,X2,X3,.....,Xn be a random sample            fx;θ=θe-θxI0,∞(x)…

Q: If n=15, ¯xx¯(x-bar)=33, and s=15, construct a confidence interval at a 90% confidence level. Assume…

A: Confidence interval gives the range of values within the parameter of the population lies with a…

Q: the 95% confidence interval for estimating the population mean μ If sample mean X = 50, sample size…

A: We have given that  Sample size = 60 Sample mean = 50 Population standard deviation = 10.  95%…

Q: The 82.9% confidence interval estimate for μμ was (25.81, 31.35). Find the point estimate and the…

A: The confidence interval for population mean is (25.81, 31.35). Let M denote the point estimate and E…