In a random sample of 200 females and 100 males who watched a certain television program, 94 females and 34 males indicated they like it. A 95% confidence interval for the difference in proportions of all females and all males who watched the programme and liked it can be calculated with:    A. p1 – p2 ± X1/n1 – X2/n2  B. p1 – p2 ± Zα/2 (X1/n1 – X2/n2)  C. p1 – p2 ± Zα/2 √ X1/n1 + X2/n2  D. p1 – p2 ± Zα/2 √ X1/n1 (1 - X1/n1) + X2/n2 (1 - X2/n2)  E. None of the preceding

Q: A poll of 1142 voters asked what the most significant issue was in the upcoming election. 1028 of…

A: X=1028, n=1142 α=0.14 p^=X/n= proportion Margin of error=MOE=Zα/2p^(1-p^)n

Q: A 99% confidence interval for is given by (0.89, 2.34). Based on this interval what can be said…

A: 95% CI for difference between σ2  = (0.89 , 2.36)

Q: 11.3.3

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Q: Bob selects independent random samples from two populations and obtains the values p1 = 0.700 and p2…

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Q: A sample of size 16 was taken from a very large population. Sample statistics, x¯ and s, were used…

A: Formulae to find x¯ and s from confidence interval is as follows ,    x¯ = Lower limit +Upper limit…

Q: 6.20 Government shutdown. The United States federal govern! from December 22, 2018 until January 25,…

A: The null and alternative hypothesis will be : Ho : p<40k-p≥40k=0H1 : p<40k-p≥40k≠0 (a) False…

Q: Suppose a study reported that the average person watched 1.87 hours of television per day. A random…

A: Consider that μ is the population mean amount of television watched by the average person per day.

Q: Is kummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.t Suppose a small group…

A: It is given that the sample mean is 3.15 and the population standard deviation is 0.38.

Q: Find a 94% confidence interval for A given that x = 20. a = 3. n = 30

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Q: Construct both a 90% and a 80% confidence interval for B1. B, = 44, s = 4.7, SS= 43, n = 12 90% :…

A: Obtain the 90% confidence interval for slope. The 90% confidence interval for slope is obtained…

Q: :Which of the following statements is true

A: The 95% confidence interval for difference in the means is given by (3.52, 7.06)

Q: A survey of 500 randomly selected students was taken and 200 responded that they favor candidate Z…

A: The confidence interval given is (-0.3090, -0.1767)This interval represents the range within which…

Q: ind the 95% confidence interval for μ given that n = 16, X̄ = 28 and σ = 6.

A: Given Information: Sample size n=16 Sample mean x¯=28 Population standard deviation σ=6 Confidence…

Q: Researchers randomly selected 50 males between the ages of 25 and 44 years to participate in a…

A: The given 95% confidence interval for the proportion of all males between 25 and 44 years old with…

Q: initiative is between (round to 3 decimal places) and (round to 3 decimal places). b. If many groups…

A: given  n1=579x1=408n2=546x2=450 then the proportion are  p1=x1n1=408579=0.704663…

Q: Express the confidence interval (44.5 % , 55.1 % ) in the form of p ± E.

A: Given confidence interval is Lower limit=44.5 Upper limit=55.1   Express in form of p±E

Q: 2. Two detergents were tested for their ability to remove stains. The first one was suc- cessful on…

A: Given x1=63, n1=91          x2=42, n2=79 The critical value of Z-score at 95% confidence interval is…

Q: Example 4.3.4. We are interested in estimating the population of fish in a lake. A sample of 150…

A: Given that

Q: Recently gasoline prices rose drastically. Suppose that a study was conducted using truck drivers…

A: We associate with the interval estimate is called confidence interval. This probability indicates…

Q: Construct a 95% confidence interval for ₁-₂. Two samples are randomly selected from each population.…

A: giiven data n1 = 50n2 = 60x¯1 = 25x¯2 = 23σ1 = 1.5σ2 = 1.995% ci for μ1-μ2.

Q: Bob selects independent random samples from two populations and obtains the values p1 = 0.700 and p2…

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Q: Given a 99% confidence interval for mu1-mu2 as (5, 10). What can be concluded?   A. nothing   B.…

A: Given Information: 99% confidence interval for μ1-μ2 is (5, 10). Lower bound is 5 and upper bound is…

Q: The correlation coefficient r=0.15, is given for a sample of n= 13 data points. Use the a = 0.05…

A: From the given table of critical values, we go for n = 13 and alpha = 0.05, we get  Critical value =…

Q: A sample of n=24 is selected from a population = 120 and σ = 40.  If the sample mean is 130, what is…

A: It is given that the population mean, μ=120 and standard deviation, σ=40. For the sample size of 24,…

Q: Let p equal the proportion of letters mailed in the Netherlands that are delivered the next day.…

A: Given : Sample Size, n = 400 Number of successes, x = 284 confidence level,c=0.95

Q: Compute for the 90% confidence interval of the difference between two m when x, = 28, I. = 25, s, =…

A: Given that  Confidence level (C) = 90% Sample 1 Sample 2 Sample mean (x¯1) = 28 Sample mean…

Q: Large samples of women and men are obtained, and the hemoglobin level is measured in each subject.…

A: a. Denote μ1, μ2 as the population mean hemoglobin level of mean and women, respectively.

Q: wo different researchers measured the weight of two separate samples of ruby-throated hummingbirds…

A: a) Two researchers get different answers.  The researchers have two different samples. 95%…

Q: Assume that you have a sample of n, = 7, with the sample mean X, = 48, and a sample standard…

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Q: A random sample of n1n1 = 272 people who live in a city were selected and 74 identified as a "dog…

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Q: the correlation coefficient r=0.21 is given for a sample of n= 72 data points. Use the a=0.85 column…

A: Sample of size n=72  with sample correlation coefficient r=0.21 To test that correlation exist in…

Q: A sample of n = 10 scores has a mean of M = 3. What is ΣX for this sample?

A: Solution: From the given information, M=3 and n=10.

Q: For a population of normally distributed scores, μ = 155 and σ = 12, approximately what would be the…

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Q: A sample of 260 observations selected from a population produced a sample proportion equal to 0.85.…

A: From the given information, let X be the number of observations selected from the population. Total…

Q: Given two independent random samples with the following results: n₁ = 15 X₁ = 149 S₁ = 32 1₂ = 15 X2…

A: From the provided information,Confidence level = 95%

Q: A random sample of air travelers were surveyed and a 95% confidence interval for the average arrival…

A: Given: 95% Confidence Interval = (98 minutes,  110 minutes) Lower bound = 98 Upper bound = 110…

Q: A researcher obtained the following for the 95% confidence interval for Pearson's correlation.…

A: Solution-: Solution-: A researcher obtained the following for the 95% confidence interval for…

Q: The correlation coefficient r=0.45, is given for a sample of n=72 data points. Use the a = 0.05…

A: From the given data determine whether conclude there is a correlation in the population or not.

Q: The university professor is interested in comparing how much students learn in online versus…

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Q: Assume that you have a sample of n1=8, with the sample mean x1=44, and a sample standard deviation…

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

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Q: The scores of a certain population on the Wechsler Intelligence Scale for Children (WISC) are…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: Let μ denote some population mean of interest and suppose a 95% confidence interval for μ is…

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Q: Construct a​ 95% confidence interval for μ1−μ2. Two samples are randomly selected from each…

A: The random variable X follows normal distribution. We have to construct the 95% confidence interval…

Q: 17.18  4S overall mortality. The 4S study introduced in Exercise 17.17 also tallied deaths due to…

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Q: Bob selects independent random samples from wo populations and obtains the values p1 0.700 and p2 =…

A: