A team of researchers found that age distributions in a population of 100,000 people was not Normal. However, after they took a large number of simple random samples, each with (N=100), they observed that the sampling distribution of mean tended toward Normality. Really? Why is it possible?

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Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: Exercise: Medical researchers conducted a study to determine whether treadmill exercise could…

A: The provided information is as follows:The sample size of the patients who walked on the treadmill…

Q: 8. The psychology department is gradually changing its curriculum by increasing the number of online…

A: Since you have posted multiple questions , we will solve first question for you. To get the…

Q: ribution. Wha

A: The mean is given , μ=20 days. The variance is given , σ2=5 days. Therefore, the standard deviation…

Q: Suppose 1% of students drink more than 3 cups of coffee each day. To check this claim, a researcher…

A: Given that p = 0.01 ,n=133 What is the sampling distribution of the sample proportion? What is the…

Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

A:

Q: A Pre-Calculus course at a large high school has 427 students enrolled in the course. A recent test…

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Q: Testing the hypothesis using a one-tailed test at 0.01 level of significance, do these data support…

A: here  population standard deviation  = 12 n= 36 alpha  =   0.01

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A: Claim: the average age of diagnosis of these patients is different from 50 years.The null and…

Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

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

Q: Dr. Vegapunk thinks that watching anime (Japanese animated shows) decreases social skills in college…

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Q: What is the likelihood that a randomly selected student from a population of 500 has a grade point…

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Q: d a mean of $67,691 and standard deviation of $14,506, while women had a mean of $65,323 and a…

A: given data mound shaped distribution for salaries, ∴ X~N(μ,σ)μ1 = 67691μ2 = 65323σ1 = 14506σ2 =…

Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

A: Given: Level of significance = 0.05 n = 19 Sample mean = x bar = 1450 s = 202

Q: The (sample) average time for the subjects is 30 seconds. Give an upper 97.5% bound (one-sided) for…

A: See the hand written solution

Q: Kuta Software - Infinite Precalculus Name Binomial Probability Date Period Find the probability of…

A: (5) Let X denotes the number of times the archer hits the bulls eye out of 5 times.

Q: Insurance Company A claims that its customers pay less for car insurance, on average, than customers…

A: Company A Sample size, n1=11 Sample mean, x¯1=150 Sample sd, s1=12   Company B Sample size, n2=13…

Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

A:

Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

A:

Q: Dr. Vegapunk thinks that watching anime (Japanese animated shows) decreases social skills in college…

A: Dr. Vegapunk thinks that watching anime (Japanese animated shows) decreases social skills in college…

Q: A survey of 40 international students who are studying a postgraduate degree in Sydney reveals that…

A: Denote p as the population proportion. If x denotes the number of cases favorable to an event in a…

Q: We are trying to test whether, a new low fat diet actually helps obese people lose weight. 150…

A: Solution: Hypothesis testing:   From the above hypothesis test we can conclude that the low fat…

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Q: Weight loss, walking, and dementia. Miyoshi and colleagues (2008) showed that increased walking…

A: Introduction: The median is a measure of central tendency of a set of observations, which uses the…

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A: The confidence interval of population mean is an inference process to estimate the population mean.…

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Q: nsurance Company A claims that its customers pay less for car insurance, on average, than customers…

A: The question is about hypo. testing Given :  Randomly selected people who buy insurance from comp. A…

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A: It is given that a sample of 1,000 adults from a population is randomly selected and the population…

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A: Given

Q: Exercise: Medical researchers conducted a study to determine whether treadmill exercise could…

A: Let X1 be the distance walked by patients using a treadmill and X2 the distance walked by patients…

Q: Exercise: Medical researchers conducted a study to determine whether treadmill exercise could…

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Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Given data,n1=40x1=46.6σ1=4.6n2=45x2=48.8σ2=2.4Compute value of test statistic?

Q: of all adults in a population would say “good” and 65% would say “bad” if they were asked how they…

A: Given: p = 35% = 0.35 n = 1000 The variance is calculated as: The standard deviation can be…

Q: A marketing research company wants to determine if there is a difference in the mean satisfaction…

A: Given information  n1=n2=100, sample mean x̄1=4.6, sample mean x̄2=4.5, standard deviation s1=s2=0.8…

Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

A: Given, n = 18 μ = 18x = 1380s = 248α = 0.1     To find, Check the claim it be concluded that the…

Q: Research has demonstrated that adults taking at least 7000 steps per day (steps/d) had lower risk of…

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Q: Babcock and Marks (2010) review survey data from 2003–2005, and obtained an average of mean = 14…

A: It is an important part of statistics. It is widely used.

Q: A surprising fact is that only 56% of all teens use a password on their mobile device. If a poll…

A: It is given that the standard deviation is 1.6%.

Q: A professor at a university gives her large class an examination and finds that the scores follow…

A: mean = 73 sigma = 8

Q: A sample of scores has a mean of M = 20, a median of 28, and a mode of 29. What is the most likely…

A: Given Mean=20 Median=28 Mode=29

Q: Suppose that you want to perform a hypothesis test based on independent random samples to compare…

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Q: p1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. Ho : Ha =…

A: here test there is a significant difference between the IQs of two group  and it is paired data

Q: The psychology department is gradually changing its curriculum by increasing the number of online…

A: a. Let μ denotes the population mean of new online course. The claim of the test is the new online…