A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 8% margin of error at a 90% confidence level, what size of sample is needed?   What value did you use for ˆpp^ ?  Why did you choose that value?

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A:

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A: The given sample size is 43, sample mean is 65.5 and standard deviation is 11.3.

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A: It is given that a manufacturing machine has a 7% defect rate, and 4 items are chosen at random.

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A: Given that  Sample size n=6 Population mean =70

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A: Type1 error : ( false-positive )  * It occurs when null hypothesis rejected that is true. Type 2…

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A: Given that  Margin of error =E =4%=0.04 Sample size n =180 Sample proportion p^=35%=0.35

Q: Problem 2. Consider TSLS estimation with a single included endogenous variable and a single…

A: Let regress Xi on Zi and obtain predicted values               X^i=π^0 +π^1Zi    ------(1) and if…

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A: Solution: Given information: n= 9 sample size μ= 12 Population mean x=∑xn=107.49=11.9333 Sample mean…

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A:

Q: One of the most​ impressive, innovative advances in online fundraising over the past decade is the…

A: Comment: As per the company guidelines we are supposed to answer only three subparts. Kindly repost…

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A: Formula Used: If Larger standard deviationSmaller standard deviation > 2 ,then we shall  T-test…

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A: Answer: - Given sample size n = 33                  sample mean x = 47, and population standard…

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A: given data uniform distributionX~U(7,24)we have to find out p(U>12)=?

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A: given data  95% ci for P  E = 0.01 n = ?

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A: The given sample size is 40, sample mean is 120.1 and sample standard deviation is 13.1.

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A: The following solution is provided below:

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Q: b. How is it possible for the standard deviation to be greater than the average? c.Why can I still…

A: For the distribution of salary of a specified country, it is interpreted that: μ (mean)=$2000σ…

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A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

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A: It is given that  Sample size, n = 17 Confidence level = 90%

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A: One $1000 prize  Two $700 prize  Three $400 prize  Five $100 prize   Ticket price Total tickets =…

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A: From the provided information, Mean (µ) = 16.1 Standard deviation (σ) = 4.0 X~N (16.1, 4.0)

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Q: Find the margin of error at a 80% confidence level for estimating the population mean if n = 15, x =…

A: Given: Sample size n = 15 Sample mean X = 44 Sample standard deviation s = 10 Confidence level = 80%…

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Q: hen calculating Cohen's d for an independent-samples t test, what value is used as the denominator?…

A: Solution: To find the denominator value When calculating Cohen's d for an independent-samples t…

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A: Given, variance between the groups as a ratio within groups is the?

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Q: You are interested in investigating the efficacy of a new pain medication and design an experiment…

A: It is needed to find the type of t test.

Q: [Questions 6-10] The Bank of Buffalo reports that 20% of its credit card holders default at some…

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Q: he Acme Company has developed a new battery. The engineer in charge claims that the new battery will…

A: Notation 1  for new  2 for old

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A: It is given that  For sample 1: s21 = 0.235 n1 = 21   For sample 2: s22 = 0.128 n2 = 26

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A: It is given that the statement about to the distribution of X̄.

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A: It is needed to check whether the given statement is true or false.

Q: population of values has a normal distribution with μ=153.2μ=153.2 and σ=92.2σ=92.2. You intend to…

A: GIVEN DATA, normal  disreibution μ=153.2σ=92.2n=205we have to find  out the given  percentile values…

Q: Compare Forward and Backward Stepwise Selection advantages and disadvantages.

A: Solution: Here, it is to compare forward and backward stepwise selection.

Q: Q1 Let (X₁, X2) be jointly continuous with joint probability density function f(x1, x₂) = x1 0 " 0 <…

A: Given that, The joint probability density function of X1 and X2 is given as:…

Q: Question 3 A In a single pump petrol station, it was observed that the inter-arrival times and…

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Q: You are interested in investigating the efficacy of a stressor and design an experiment measuring…

A: Given: Sample size n = 12 Formula Used: Degrees of freedom = n-1

Q: The Acme Company has developed a new battery. The engineer in charge claims that the new battery…

A: Given: For Old Batteries: n1 = 100 X1 = 190 s1 = 20 For New Batteries: n2 = 100 X2 = 200 s2 = 40…