If n = 420 and ˆpp^ (p-hat) = 0.7, construct a 90% confidence interval. Give your answers to three decimal

Q: A poll of 2108 U.S. adults found that 36% regularly used Facebook as a news source. Find the margin…

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Q: The confidence interval for a population porportion is (0.58, 0.78). What the the sample proportion…

A:

Q: Blood pressure is 127.58 sample of 41 males,, 35-44 in age.. blood pressure of 5.76. Find 95% co…

A: Given: Sample meanx¯=127.58Sample size(n)=41Sample standard deviation(s)=5.76

Q: The confidence interval for a population porportion is (0.45, 0.63). What the the sample proportion…

A: The confidence interval for a population proportion is 0.45,0.63. The sample proportion is, p^=Upper…

Q: recently conducted random sample of 1300 people, 952 of them said that they would start eating…

A:

Q: he effects of mentoring on intelligence scores. He wanted to know as a baseline what the averag

A: mean(μ)=100standard deviation(σ)=16  n=50    let X~N(100,16)

Q: The confidence interval for a population porportion is (0.52, 0.78). What the the sample proportion…

A: Given that, Confidence interval for population proportion is (0.52, 0.78)

Q: Juan is in his first semester at a university and is taking a calculus course with a large…

A: given data  mean of exam (μ) = 83standard deviation (σ) = 9for juan score(x) = 57Z score =?

Q: Many high school students take either the SAT or the ACT. However, some students take both. Data…

A: For ACT:n = 100 = 20 = 5For SAT:n = 100 = 920 = 170Also, the correlation coefficient between SAT and…

Q: Assume that math test scores are normally distributed with a mean of 500 and a standard deviation of…

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Q: Suppose X1, ..., Xn are iid with PDF f (x | 0) = 40ªx-5. x > 0, where 0 > 0. Find the method of…

A:

Q: 4. Harry’s score was 66 on an exam that had a mean of 57 and a standard deviation of 6. Find and…

A: Let  denote the Harry’s score in the exam.Given that,,, and

Q: Define P-value?

A:

Q: How can I find the 95% confidence interval for a hazard ratio based on theta1 and theta2 from an…

A: The hazard ratio can be defined as the ratio of failure rates of two survival distributions.  In…

Q: Question 8 > Calculate the test-statistic, t with the following information. = 0.73 0.91 ni 60, ã1 =…

A: Solution

Q: Q4/ The average on a statistics test was 78 with a standard deviation of 8. If the test scores are…

A:

Q: What is the use of power curve?

A: The power curve is represented by 1-β where β stands to be the probability of committing type II…

Q: please help me review for my test thank you

A: Next, we look up these Z-scores in the standard normal distribution table.The area to the left of…

Q: 1. Suppose that Jerry (a baker) wants to find a 95% Confidence Interval for the mean baking time for…

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

Q: One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from…

A: Assume that p is the true proportion of illegal drug use in her school.

Q: a sample of 1963 scores was drawn from a normal distribution with a mean of 19.84 and a standard…

A: Given that, μ=19.84,σ=1.918n=1963 Consider that exactly 2.3512% of the distribution of means falls…

Q: A certain psychological test measures empathy and emotional intelligence. The mean and standard…

A: Given that A certain psychological test measures empathy and emotional intelligence. The mean and…

Q: To test the effect of alcohol in increasing the reaction time to respond to a given stimulus, the…

A: The following information has been provided: Before After d=μd=μbefore-μafter 3 8 3-8=-5 5 9…

Q: The confidence interval for a population porportion is (0.68, 0.82). What the the sample proportion…

A: Given, Confidence Interval is (0.68, 0.82) Upper limit U  = 0.82 Lower limit L = 0.68

Q: what is the formula for finding the inter quartile range

A: Quartiles:Three Quartiles,The first quartile separates the lowest 25% of the observations from the…

Q: Linda is in her first semester at a university and is taking a calculus course with a large…

A:

Q: Explain difference between three formulas that are used in t-test for two samples with real life…

A: The different types used in t-test for two samples are: Independent t-test (unpaired data) which is…

Q: From generation to generation, the mean age when smokers first start to smoke varies. However, the…

A: Given, n = 37 population standard deviation, σ = 2.1 sample mean, -x = 18.1 confidence level = 95%…

Q: The first sample the mean =12 The variance = 16 %3D n1=10 The second sample E1xifi = 280, %3D > xf;…

A: Standard deviation of combined series: SD=n1s12+n2s22n1+n2+n1*n2(x1-x2)2(n1-n2)2 i) Using Excel,

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.